-31=x+x-7

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Solution for -31=x+x-7 equation:


Simplifying
-31 = x + x + -7

Reorder the terms:
-31 = -7 + x + x

Combine like terms: x + x = 2x
-31 = -7 + 2x

Solving
-31 = -7 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
-31 + -2x = -7 + 2x + -2x

Combine like terms: 2x + -2x = 0
-31 + -2x = -7 + 0
-31 + -2x = -7

Add '31' to each side of the equation.
-31 + 31 + -2x = -7 + 31

Combine like terms: -31 + 31 = 0
0 + -2x = -7 + 31
-2x = -7 + 31

Combine like terms: -7 + 31 = 24
-2x = 24

Divide each side by '-2'.
x = -12

Simplifying
x = -12

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