31-21=x-8

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Solution for 31-21=x-8 equation:


Simplifying
31 + -21 = x + -8

Combine like terms: 31 + -21 = 10
10 = x + -8

Reorder the terms:
10 = -8 + x

Solving
10 = -8 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
10 + -1x = -8 + x + -1x

Combine like terms: x + -1x = 0
10 + -1x = -8 + 0
10 + -1x = -8

Add '-10' to each side of the equation.
10 + -10 + -1x = -8 + -10

Combine like terms: 10 + -10 = 0
0 + -1x = -8 + -10
-1x = -8 + -10

Combine like terms: -8 + -10 = -18
-1x = -18

Divide each side by '-1'.
x = 18

Simplifying
x = 18

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