15-x-15=90

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Solution for 15-x-15=90 equation: 


Simplifying
15 + -1x + -15 = 90

Reorder the terms:
15 + -15 + -1x = 90

Combine like terms: 15 + -15 = 0
0 + -1x = 90
-1x = 90

Solving
-1x = 90

Solving for variable 'x'.

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

Divide each side by '-1'.
x = -90

Simplifying
x = -90

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