12x+15=6x-3

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Solution for 12x+15=6x-3 equation: 



12x+15=6x-3

We move all terms to the left:

12x+15-(6x-3)=0

We get rid of parentheses

12x-6x+3+15=0

We add all the numbers together, and all the variables

6x+18=0

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

6x=-18

x=-18/6

x=-3

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