-x-15=7x-87

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Solution for -x-15=7x-87 equation:


Simplifying
-1x + -15 = 7x + -87

Reorder the terms:
-15 + -1x = 7x + -87

Reorder the terms:
-15 + -1x = -87 + 7x

Solving
-15 + -1x = -87 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
-15 + -1x + -7x = -87 + 7x + -7x

Combine like terms: -1x + -7x = -8x
-15 + -8x = -87 + 7x + -7x

Combine like terms: 7x + -7x = 0
-15 + -8x = -87 + 0
-15 + -8x = -87

Add '15' to each side of the equation.
-15 + 15 + -8x = -87 + 15

Combine like terms: -15 + 15 = 0
0 + -8x = -87 + 15
-8x = -87 + 15

Combine like terms: -87 + 15 = -72
-8x = -72

Divide each side by '-8'.
x = 9

Simplifying
x = 9

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