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natali 33 [55]
3 years ago
10

Solve 3x-y=7 for x if weird answer will report

Mathematics
2 answers:
Luba_88 [7]3 years ago
8 0

Answer:

x = 1/3y +7/3

Step-by-step explanation:

3x-y=7

Add y to each side

3x-y+y=7+y

3x = y+7

Divide each side by 3

3x/3 = y/3 + 7/3

x = 1/3y +7/3

Nata [24]3 years ago
5 0

Answer:

x= 7/3 + y/3

Step-by-step explanation:

divide each term by 3 and simplify

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How do you solve the equation<br> x-2y-1=0<br> y-5x+14=0
Tcecarenko [31]

The solution is x= 3 and y = 1

Step-by-step explanation:

Given equations are:

x-2y-1 = 0\ \ \ \ Eqn1\\y-5x+14 = 0\ \ \ \ Eqn2

From equation 1:

x = 2y+1

Putting in equation 2:

y - 5(2y+1)+14 = 0\\y-10y-5 +14 = 0\\-9y-5+14 = 0\\-9y+9 = 0\\-9y+9-9 = 0-9\\-9y = -9

Dividing both sides by -9

\frac{-9y}{-9} = \frac{-9}{-9}\\y = 1

Putting y = 1 in equation 1:

x - 2(1)-1 = 0\\x -2-1 = \\x-3 = 0\\x-3+3 = 0+3\\x = 3

Hence,

The solution is x= 3 and y = 1

Keywords: Linear equations, polynomials

Learn more about linear equations at:

  • brainly.com/question/4021035
  • brainly.com/question/4034547

#LearnwithBrainly

6 0
3 years ago
Describe the number and type of roots for the polynomial (how many real and complex?). x3 + 5x2 – 4x – 2 = 0
zloy xaker [14]
Descartes' rule of signs tells you the one sign change in the coefficients means there's one positive real root. If you change the sign of the odd-power terms, the signs become -++-, so have two sign changes. This means there are 0 or 2 negative real roots.

A graph shows there to be 3 real roots, two of which are negative. Thus there are no complex roots.

7 0
3 years ago
Explain how to rewrite the equation -2x - 6y = 18 in slope-intercept form.
MrMuchimi

Answer:

y = -1/3x -3

Step-by-step explanation:

-2x - 6y = 18

We want to solve for y since the slope intercept form is y =mx+b where m is the slope and b is the y intercept

Add 2x to each side

-2x-6y +2x = 2x+18

-6y = 2x+18

Divide each side by -6

-6y/-6 = 2x/-6 + 18/-6

y = -1/3x -3

This is in slope intercept form with the slope -1/3 and the y intercept -3

4 0
4 years ago
Read 2 more answers
Can someone help me with question 4
Delvig [45]

Make sure you remember to use the distributive property, and enter your x and y values into the equation.

-8( x - 3y)

-8(-2 - 3(-4))

-8(-2) + -8(12)

16 + (-96)             (or 16 - 96)

= -80

Hope this helps!

5 0
3 years ago
Read 2 more answers
What is the constant of proportionality in the equation x/y=2/9<br> HURRY
const2013 [10]

Answer:

1/9

Step-by-step explanation:

Separate the fraction (1/9) from the variable x:

y = (1/9)x.

1/9 is the constant of proportionality.

5 0
4 years ago
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