12+8x=15+9x

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Solution for 12+8x=15+9x equation: 



12+8x=15+9x

We move all terms to the left:

12+8x-(15+9x)=0

We add all the numbers together, and all the variables

8x-(9x+15)+12=0

We get rid of parentheses

8x-9x-15+12=0

We add all the numbers together, and all the variables

-1x-3=0

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

-x=3

x=3/-1

x=-3

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