15x+9=-3+12x

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



15x+9=-3+12x

We move all terms to the left:

15x+9-(-3+12x)=0

We add all the numbers together, and all the variables

15x-(12x-3)+9=0

We get rid of parentheses

15x-12x+3+9=0

We add all the numbers together, and all the variables

3x+12=0

We move all terms containing x to the left, all other terms to the right

3x=-12

x=-12/3

x=-4

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