31-(x+7)=7x-8

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Solution for 31-(x+7)=7x-8 equation:


Simplifying
31 + -1(x + 7) = 7x + -8

Reorder the terms:
31 + -1(7 + x) = 7x + -8
31 + (7 * -1 + x * -1) = 7x + -8
31 + (-7 + -1x) = 7x + -8

Combine like terms: 31 + -7 = 24
24 + -1x = 7x + -8

Reorder the terms:
24 + -1x = -8 + 7x

Solving
24 + -1x = -8 + 7x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-7x' to each side of the equation.
24 + -1x + -7x = -8 + 7x + -7x

Combine like terms: -1x + -7x = -8x
24 + -8x = -8 + 7x + -7x

Combine like terms: 7x + -7x = 0
24 + -8x = -8 + 0
24 + -8x = -8

Add '-24' to each side of the equation.
24 + -24 + -8x = -8 + -24

Combine like terms: 24 + -24 = 0
0 + -8x = -8 + -24
-8x = -8 + -24

Combine like terms: -8 + -24 = -32
-8x = -32

Divide each side by '-8'.
x = 4

Simplifying
x = 4

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