18=6x+6(-3x-7)

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Solution for 18=6x+6(-3x-7) equation:


Simplifying
18 = 6x + 6(-3x + -7)

Reorder the terms:
18 = 6x + 6(-7 + -3x)
18 = 6x + (-7 * 6 + -3x * 6)
18 = 6x + (-42 + -18x)

Reorder the terms:
18 = -42 + 6x + -18x

Combine like terms: 6x + -18x = -12x
18 = -42 + -12x

Solving
18 = -42 + -12x

Solving for variable 'x'.

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

Add '12x' to each side of the equation.
18 + 12x = -42 + -12x + 12x

Combine like terms: -12x + 12x = 0
18 + 12x = -42 + 0
18 + 12x = -42

Add '-18' to each side of the equation.
18 + -18 + 12x = -42 + -18

Combine like terms: 18 + -18 = 0
0 + 12x = -42 + -18
12x = -42 + -18

Combine like terms: -42 + -18 = -60
12x = -60

Divide each side by '12'.
x = -5

Simplifying
x = -5

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