15+-7=x

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Solution for 15+-7=x equation:


Simplifying
15 + -7 = x

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

Solving
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.
8 + -1x = x + -1x

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

Add '-8' to each side of the equation.
8 + -8 + -1x = 0 + -8

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

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

Divide each side by '-1'.
x = 8

Simplifying
x = 8

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