18=-2(6x+21)

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Solution for 18=-2(6x+21) equation:


Simplifying
18 = -2(6x + 21)

Reorder the terms:
18 = -2(21 + 6x)
18 = (21 * -2 + 6x * -2)
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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