3(7+3x)=12

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Solution for 3(7+3x)=12 equation: 


Simplifying
3(7 + 3x) = 12
(7 * 3 + 3x * 3) = 12
(21 + 9x) = 12

Solving
21 + 9x = 12

Solving for variable 'x'.

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

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

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

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

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

Simplifying
x = -1

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