Question

20x + 7 - 4x = 87
How do you do this

Answer 1

x=5

Explanation:

Subtract 4x from 20x.

16x + 7 = 87

Move all terms not containing x to the right side of the equation.

Subtract

7

from both sides of the equation.

16x = 87 − 7

Subtract 7 from 87.

16x = 80

Divide each term by 16 and simplify.

x=5

Answer 2

x= 5

Explanation:

20x + 7 - 4x = 87

you start by combining like terms = 20x - 4x = 16x

16x + 7 = 87

next you want to isolate the variable so you would subtract 7 from both sides .

16x + 7 = 87

-7 . -7

16x = 80

then you divide by 16 on each side

x = 5