-129=6x+3(-7x-13)

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Solution for -129=6x+3(-7x-13) equation:


Simplifying
-129 = 6x + 3(-7x + -13)

Reorder the terms:
-129 = 6x + 3(-13 + -7x)
-129 = 6x + (-13 * 3 + -7x * 3)
-129 = 6x + (-39 + -21x)

Reorder the terms:
-129 = -39 + 6x + -21x

Combine like terms: 6x + -21x = -15x
-129 = -39 + -15x

Solving
-129 = -39 + -15x

Solving for variable 'x'.

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

Add '15x' to each side of the equation.
-129 + 15x = -39 + -15x + 15x

Combine like terms: -15x + 15x = 0
-129 + 15x = -39 + 0
-129 + 15x = -39

Add '129' to each side of the equation.
-129 + 129 + 15x = -39 + 129

Combine like terms: -129 + 129 = 0
0 + 15x = -39 + 129
15x = -39 + 129

Combine like terms: -39 + 129 = 90
15x = 90

Divide each side by '15'.
x = 6

Simplifying
x = 6

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