90=-2x-(-2x)-6

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Solution for 90=-2x-(-2x)-6 equation: 


Simplifying
90 = -2x + -1(-2x) + -6

Remove parenthesis around (-2x)
90 = -2x + -1 * -2x + -6

Multiply -1 * -2
90 = -2x + 2x + -6

Reorder the terms:
90 = -6 + -2x + 2x

Combine like terms: -2x + 2x = 0
90 = -6 + 0
90 = -6

Solving
90 = -6

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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