-21=3(-6x-3)

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Solution for -21=3(-6x-3) equation:


Simplifying
-21 = 3(-6x + -3)

Reorder the terms:
-21 = 3(-3 + -6x)
-21 = (-3 * 3 + -6x * 3)
-21 = (-9 + -18x)

Solving
-21 = -9 + -18x

Solving for variable 'x'.

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

Add '18x' to each side of the equation.
-21 + 18x = -9 + -18x + 18x

Combine like terms: -18x + 18x = 0
-21 + 18x = -9 + 0
-21 + 18x = -9

Add '21' to each side of the equation.
-21 + 21 + 18x = -9 + 21

Combine like terms: -21 + 21 = 0
0 + 18x = -9 + 21
18x = -9 + 21

Combine like terms: -9 + 21 = 12
18x = 12

Divide each side by '18'.
x = 0.6666666667

Simplifying
x = 0.6666666667

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