3(x-12)=21

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


Simplifying
3(x + -12) = 21

Reorder the terms:
3(-12 + x) = 21
(-12 * 3 + x * 3) = 21
(-36 + 3x) = 21

Solving
-36 + 3x = 21

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + 3x = 21 + 36

Combine like terms: -36 + 36 = 0
0 + 3x = 21 + 36
3x = 21 + 36

Combine like terms: 21 + 36 = 57
3x = 57

Divide each side by '3'.
x = 19

Simplifying
x = 19

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