3x-9=0(12+x)

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Solution for 3x-9=0(12+x) equation: 


Simplifying
3x + -9 = 0(12 + x)

Reorder the terms:
-9 + 3x = 0(12 + x)

Anything times zero is zero.
-9 + 3x = 0(12 + x)

Solving
-9 + 3x = 0

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 = 0 + 9

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

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

Divide each side by '3'.
x = 3

Simplifying
x = 3

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