18=3x+3(-2x-18)

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Solution for 18=3x+3(-2x-18) equation:


Simplifying
18 = 3x + 3(-2x + -18)

Reorder the terms:
18 = 3x + 3(-18 + -2x)
18 = 3x + (-18 * 3 + -2x * 3)
18 = 3x + (-54 + -6x)

Reorder the terms:
18 = -54 + 3x + -6x

Combine like terms: 3x + -6x = -3x
18 = -54 + -3x

Solving
18 = -54 + -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.
18 + 3x = -54 + -3x + 3x

Combine like terms: -3x + 3x = 0
18 + 3x = -54 + 0
18 + 3x = -54

Add '-18' to each side of the equation.
18 + -18 + 3x = -54 + -18

Combine like terms: 18 + -18 = 0
0 + 3x = -54 + -18
3x = -54 + -18

Combine like terms: -54 + -18 = -72
3x = -72

Divide each side by '3'.
x = -24

Simplifying
x = -24

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