6(x+7)+6x=-66

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Solution for 6(x+7)+6x=-66 equation:


Simplifying
6(x + 7) + 6x = -66

Reorder the terms:
6(7 + x) + 6x = -66
(7 * 6 + x * 6) + 6x = -66
(42 + 6x) + 6x = -66

Combine like terms: 6x + 6x = 12x
42 + 12x = -66

Solving
42 + 12x = -66

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 + 12x = -66 + -42

Combine like terms: 42 + -42 = 0
0 + 12x = -66 + -42
12x = -66 + -42

Combine like terms: -66 + -42 = -108
12x = -108

Divide each side by '12'.
x = -9

Simplifying
x = -9

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