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tatuchka [14]
3 years ago
7

7=5y-13-y solve for y

Mathematics
2 answers:
bulgar [2K]3 years ago
6 0
First, you must combine all like terms.
'5y' and a '-y' account to a positive '4y'.

7=4y-13

add 13 to both sides to cancel out the -13 on the right side of the equation. we're left with:

20=4y

you must divide by 4 on both sides to get 1y by itself, to know its value. we do so and we get,

y= 5

hope that helped. (:
Olenka [21]3 years ago
5 0

Answer: The value of y= 5

Step-by-step explanation:

The given equation : 7=5y-13-y

To solve the above equation, we first combine the like terms :-

7=5y-y-13\\\\\Rightarrow\ 7=4y-13

Adding 13 on both the sides, we get

7+13=4y\\\\\Rightarrow20=4y\\\\\Rightarrow 4y=20\\\\\Rightarrow\ y=\dfrac{20}{4}\\\\\Rightarrow\ y=5

Hence, the value of y= 5

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A landscaper is planting a row of 10 shrubs along the walkway shown below. There must be one shrub at the very beginning and one
rewona [7]

Answer:

9d = 36

Step-by-step explanation:

See attachment for complete question

Length = 36ft

n = 10

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Taking the first as a point of reference, we're left with:

(n - 1) * distance = 36

Substitute 10 for n and d for distance

(10 - 1) * d = 36

9 * d = 36

9d = 36

Hence:

9d = 36 answers the question

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What is x in the equation 753.6=(3.14)(6)^2(x)
vichka [17]

Answer:

 x = 20/3 = 6.667

Step-by-step explanation:

Changes made to your input should not affect the solution:

(1): "3.14" was replaced by "(314/100)". 2 more similar replacement(s)

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

          (7536/10)-(((314/100))*(6)^2*(x))=0

Step by step solution :

Step  1  :

1.1     6 = 2•3

(6)2 = (2•3)2 = 22 • 32

Equation at the end of step  1  :

 7536      314

 ———— -  ((——— • (22•32)) • x)  = 0

  10       100

Step  2  :

           157

Simplify   ———

           50

Equation at the end of step  2  :

 7536      157

 ———— -  ((——— • (22•32)) • x)  = 0

  10       50

Step  3  :

Dividing exponents :

3.1    22   divided by   21   = 2(2 - 1) = 21 = 2

Equation at the end of step  3  :

 7536     2826

 ———— -  (———— • x)  = 0

  10       25

Step  4  :

           3768

Simplify   ————

            5  

Equation at the end of step  4  :

 3768    2826x

 ———— -  —————  = 0

  5       25  

Step  5  :

Calculating the Least Common Multiple :

5.1    Find the Least Common Multiple

     The left denominator is :       5

     The right denominator is :       25

       Number of times each prime factor

       appears in the factorization of:

Prime

Factor   Left

Denominator   Right

Denominator   L.C.M = Max

{Left,Right}

5 1 2 2

Product of all

Prime Factors  5 25 25

     Least Common Multiple:

     25

Calculating Multipliers :

5.2    Calculate multipliers for the two fractions

   Denote the Least Common Multiple by  L.C.M

   Denote the Left Multiplier by  Left_M

   Denote the Right Multiplier by  Right_M

   Denote the Left Deniminator by  L_Deno

   Denote the Right Multiplier by  R_Deno

  Left_M = L.C.M / L_Deno = 5

  Right_M = L.C.M / R_Deno = 1

Making Equivalent Fractions :

5.3      Rewrite the two fractions into equivalent fractions

Two fractions are called equivalent if they have the same numeric value.

For example :  1/2   and  2/4  are equivalent,  y/(y+1)2   and  (y2+y)/(y+1)3  are equivalent as well.

To calculate equivalent fraction , multiply the Numerator of each fraction, by its respective Multiplier.

  L. Mult. • L. Num.      3768 • 5

  ——————————————————  =   ————————

        L.C.M                25  

  R. Mult. • R. Num.      2826x

  ——————————————————  =   —————

        L.C.M              25  

Adding fractions that have a common denominator :

5.4       Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

3768 • 5 - (2826x)     18840 - 2826x

——————————————————  =  —————————————

        25                  25      

Step  6  :

Pulling out like terms :

6.1     Pull out like factors :

  18840 - 2826x  =   -942 • (3x - 20)

Equation at the end of step  6  :

 -942 • (3x - 20)

 ————————————————  = 0

        25      

Step  7  :

When a fraction equals zero :

7.1    When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

 -942•(3x-20)

 ———————————— • 25 = 0 • 25

      25    

Now, on the left hand side, the  25  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  -942  •  (3x-20)  = 0

Equations which are never true :

7.2      Solve :    -942   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation :

7.3      Solve  :    3x-20 = 0

Add  20  to both sides of the equation :

                     3x = 20

Divide both sides of the equation by 3:

                    x = 20/3 = 6.667

One solution was found :

                  x = 20/3 = 6.667

6 0
4 years ago
What is the value of Z in the equation to Z +7 equals -5
tangare [24]

Answer:

-12

Step-by-step explanation:

The Equation:

z + 7 = -5

Solve for the variable, z by isolating it. Note the equal sign, what you do to one side, you do to the other.

Note the rule PEMDAS.

PEMDAS is the order of operation & =

Parenthesis

Exponents (& roots)

Multiplication

Division

Addition

Subtraction

Isolate the variable. To do so, subtract 7 from both sides:

z + 7 = -5

z + 7 (-7) = -5 (-7)

z = -5 - 7

Simplify:

z = -5 - 7

z = -12

-12 is your value for z.

~

6 0
3 years ago
Read 2 more answers
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