3(4-3x)=21

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Solution for 3(4-3x)=21 equation: 


Simplifying
3(4 + -3x) = 21
(4 * 3 + -3x * 3) = 21
(12 + -9x) = 21

Solving
12 + -9x = 21

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + -9x = 21 + -12

Combine like terms: 12 + -12 = 0
0 + -9x = 21 + -12
-9x = 21 + -12

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

Divide each side by '-9'.
x = -1

Simplifying
x = -1

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