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miv72 [106K]
3 years ago
10

Solve 5(2x) = 7(x-1). Neeeeed help

Mathematics
2 answers:
Ray Of Light [21]3 years ago
8 0

Answer:

\boxed{\bold{x=-\frac{7}{3}}}

Step-by-step explanation:

Expand: \bold{5\left(2x\right): \ 10x}

Expand: \bold{7\left(x-1\right): \ 7x-7}

\bold{10x=7x-7}

Subtract 7x From Both Sides

\bold{10x-7x=7x-7-7x}

Simplify

\bold{3x=-7}

Divide Both Sides By 3

\bold{\frac{3x}{3}=\frac{-7}{3}}

Simplify

\bold{x=-\frac{7}{3}}

vekshin13 years ago
7 0

Answer:

If looking for x then X= -7/3.

Step-by-step explanation:

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Greg thinks of a number, multiplies it by 3, subtracts 5 and then multiplies by 2. His answer is 26. What number did Greg think
soldi70 [24.7K]

Answer:

x

3x

3x-5

2(3x-5)

so

2(3x-5)=26

3x-5=13

3x=18

x=6

he thought of 6

8 0
2 years ago
A rectangle is 12 feet long and 5 feet wide. If the length of the rectangle is increased by 25% and the width is decreased by 20
lisabon 2012 [21]

Answer:

30 square feet.

Step-by-step explanation:

We have to find the main area of the rectangle to determine the changes.

We know, Area of a rectangle = Length × Width

Given,

Length = 12 feet

Width = 5 feet

Therefore, the area of the rectangle = (12 × 5) Square feet.

The area of the rectangle = 60 square feet.

Now, if the length of the rectangle increased by 25%, the new length would be = 12 feet (12 feet × 25%) = 12 feet + 3 feet = 15 feet.

If the width increased by 20%, the latest width would be = 5 feet + (5 feet × 20%) = 5 feet + 1 foot = 6 feet.

The new area of that rectangle = (15 × 6) square feet = 90 square feet.

The changes of area from the previous rectangle is = (90 - 60) square feet = 30 square feet.

5 0
3 years ago
Teddy has two piggy banks. The difference in the amount of money between the two banks is no more than $10. One piggy bank has $
just olya [345]

Answer:

2.69≤x≤17.31

Step-by-step explanation:

Lety the amount in the other Piggy bank be x.

The difference in the amount of money between the two banks is no more than $10 is expressed as;

|x-7.31| ≤ 10

The value in the modulus sign can be positive or negative

If positive;

x-7.31 ≤ 10

x ≤ 10+7.31

x≤17.31

If negative

-(x-7.31) ≤ 10

-x+7.31 ≤ 10

-x ≤ 10-7.31

-x ≤ 2.69

Multiply both sides by -1

x ≥ -2.69

The compound inequality representing the amount of money in the other bank is -2.69≤x≤17.31

4 0
3 years ago
The sum of twice c and 10​
Molodets [167]

Answer:

2c+10

Step-by-step explanation:

3 0
3 years ago
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PLS HELP ME WITH MY MATH =3=<br>The sum of 10 and x is -12​
Nezavi [6.7K]

Answer:

X= 2

Step-by-step explanation:

10 + x = -12

X = 12 - 10

X = 2

6 0
3 years ago
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