3(x-2)-12=-21

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Solution for 3(x-2)-12=-21 equation: 


Simplifying
3(x + -2) + -12 = -21

Reorder the terms:
3(-2 + x) + -12 = -21
(-2 * 3 + x * 3) + -12 = -21
(-6 + 3x) + -12 = -21

Reorder the terms:
-6 + -12 + 3x = -21

Combine like terms: -6 + -12 = -18
-18 + 3x = -21

Solving
-18 + 3x = -21

Solving for variable 'x'.

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

Add '18' to each side of the equation.
-18 + 18 + 3x = -21 + 18

Combine like terms: -18 + 18 = 0
0 + 3x = -21 + 18
3x = -21 + 18

Combine like terms: -21 + 18 = -3
3x = -3

Divide each side by '3'.
x = -1

Simplifying
x = -1

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