(15-x)=87

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Solution for (15-x)=87 equation: 


Simplifying
(15 + -1x) = 87

Remove parenthesis around (15 + -1x)
15 + -1x = 87

Solving
15 + -1x = 87

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + -1x = 87 + -15

Combine like terms: 15 + -15 = 0
0 + -1x = 87 + -15
-1x = 87 + -15

Combine like terms: 87 + -15 = 72
-1x = 72

Divide each side by '-1'.
x = -72

Simplifying
x = -72

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