90=-2x-2(-6x-15)

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Solution for 90=-2x-2(-6x-15) equation:


Simplifying
90 = -2x + -2(-6x + -15)

Reorder the terms:
90 = -2x + -2(-15 + -6x)
90 = -2x + (-15 * -2 + -6x * -2)
90 = -2x + (30 + 12x)

Reorder the terms:
90 = 30 + -2x + 12x

Combine like terms: -2x + 12x = 10x
90 = 30 + 10x

Solving
90 = 30 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
90 + -10x = 30 + 10x + -10x

Combine like terms: 10x + -10x = 0
90 + -10x = 30 + 0
90 + -10x = 30

Add '-90' to each side of the equation.
90 + -90 + -10x = 30 + -90

Combine like terms: 90 + -90 = 0
0 + -10x = 30 + -90
-10x = 30 + -90

Combine like terms: 30 + -90 = -60
-10x = -60

Divide each side by '-10'.
x = 6

Simplifying
x = 6

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