20=7x+2(-2x-2)

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Solution for 20=7x+2(-2x-2) equation:


Simplifying
20 = 7x + 2(-2x + -2)

Reorder the terms:
20 = 7x + 2(-2 + -2x)
20 = 7x + (-2 * 2 + -2x * 2)
20 = 7x + (-4 + -4x)

Reorder the terms:
20 = -4 + 7x + -4x

Combine like terms: 7x + -4x = 3x
20 = -4 + 3x

Solving
20 = -4 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
20 + -3x = -4 + 3x + -3x

Combine like terms: 3x + -3x = 0
20 + -3x = -4 + 0
20 + -3x = -4

Add '-20' to each side of the equation.
20 + -20 + -3x = -4 + -20

Combine like terms: 20 + -20 = 0
0 + -3x = -4 + -20
-3x = -4 + -20

Combine like terms: -4 + -20 = -24
-3x = -24

Divide each side by '-3'.
x = 8

Simplifying
x = 8

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