3x-9=15+12

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Solution for 3x-9=15+12 equation: 


Simplifying
3x + -9 = 15 + 12

Reorder the terms:
-9 + 3x = 15 + 12

Combine like terms: 15 + 12 = 27
-9 + 3x = 27

Solving
-9 + 3x = 27

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 3x = 27 + 9

Combine like terms: -9 + 9 = 0
0 + 3x = 27 + 9
3x = 27 + 9

Combine like terms: 27 + 9 = 36
3x = 36

Divide each side by '3'.
x = 12

Simplifying
x = 12

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