-7x-8x=-90

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Solution for -7x-8x=-90 equation: 


Simplifying
-7x + -8x = -90

Combine like terms: -7x + -8x = -15x
-15x = -90

Solving
-15x = -90

Solving for variable 'x'.

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

Divide each side by '-15'.
x = 6

Simplifying
x = 6

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