-7x-2(2x-21)=-90

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Solution for -7x-2(2x-21)=-90 equation:


Simplifying
-7x + -2(2x + -21) = -90

Reorder the terms:
-7x + -2(-21 + 2x) = -90
-7x + (-21 * -2 + 2x * -2) = -90
-7x + (42 + -4x) = -90

Reorder the terms:
42 + -7x + -4x = -90

Combine like terms: -7x + -4x = -11x
42 + -11x = -90

Solving
42 + -11x = -90

Solving for variable 'x'.

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

Add '-42' to each side of the equation.
42 + -42 + -11x = -90 + -42

Combine like terms: 42 + -42 = 0
0 + -11x = -90 + -42
-11x = -90 + -42

Combine like terms: -90 + -42 = -132
-11x = -132

Divide each side by '-11'.
x = 12

Simplifying
x = 12

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