12+9x=8x-40

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Solution for 12+9x=8x-40 equation: 



12+9x=8x-40

We move all terms to the left:

12+9x-(8x-40)=0

We get rid of parentheses

9x-8x+40+12=0

We add all the numbers together, and all the variables

x+52=0

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

x=-52

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