15=31-x

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Solution for 15=31-x equation:


Simplifying
15 = 31 + -1x

Solving
15 = 31 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
15 + x = 31 + -1x + x

Combine like terms: -1x + x = 0
15 + x = 31 + 0
15 + x = 31

Add '-15' to each side of the equation.
15 + -15 + x = 31 + -15

Combine like terms: 15 + -15 = 0
0 + x = 31 + -15
x = 31 + -15

Combine like terms: 31 + -15 = 16
x = 16

Simplifying
x = 16

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