15x+9=12x-18

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Solution for 15x+9=12x-18 equation: 



15x+9=12x-18

We move all terms to the left:

15x+9-(12x-18)=0

We get rid of parentheses

15x-12x+18+9=0

We add all the numbers together, and all the variables

3x+27=0

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

3x=-27

x=-27/3

x=-9

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