129=3(-7x+7)-6x

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Solution for 129=3(-7x+7)-6x equation:


Simplifying
129 = 3(-7x + 7) + -6x

Reorder the terms:
129 = 3(7 + -7x) + -6x
129 = (7 * 3 + -7x * 3) + -6x
129 = (21 + -21x) + -6x

Combine like terms: -21x + -6x = -27x
129 = 21 + -27x

Solving
129 = 21 + -27x

Solving for variable 'x'.

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

Add '27x' to each side of the equation.
129 + 27x = 21 + -27x + 27x

Combine like terms: -27x + 27x = 0
129 + 27x = 21 + 0
129 + 27x = 21

Add '-129' to each side of the equation.
129 + -129 + 27x = 21 + -129

Combine like terms: 129 + -129 = 0
0 + 27x = 21 + -129
27x = 21 + -129

Combine like terms: 21 + -129 = -108
27x = -108

Divide each side by '27'.
x = -4

Simplifying
x = -4

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