15=7-x

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Solution for 15=7-x equation:


Simplifying
15 = 7 + -1x

Solving
15 = 7 + -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 = 7 + -1x + x

Combine like terms: -1x + x = 0
15 + x = 7 + 0
15 + x = 7

Add '-15' to each side of the equation.
15 + -15 + x = 7 + -15

Combine like terms: 15 + -15 = 0
0 + x = 7 + -15
x = 7 + -15

Combine like terms: 7 + -15 = -8
x = -8

Simplifying
x = -8

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