15-8=x-9

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Solution for 15-8=x-9 equation:


Simplifying
15 + -8 = x + -9

Combine like terms: 15 + -8 = 7
7 = x + -9

Reorder the terms:
7 = -9 + x

Solving
7 = -9 + 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.
7 + -1x = -9 + x + -1x

Combine like terms: x + -1x = 0
7 + -1x = -9 + 0
7 + -1x = -9

Add '-7' to each side of the equation.
7 + -7 + -1x = -9 + -7

Combine like terms: 7 + -7 = 0
0 + -1x = -9 + -7
-1x = -9 + -7

Combine like terms: -9 + -7 = -16
-1x = -16

Divide each side by '-1'.
x = 16

Simplifying
x = 16

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