12x+42=8.5x-40

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Solution for 12x+42=8.5x-40 equation: 



12x+42=8.5x-40

We move all terms to the left:

12x+42-(8.5x-40)=0

We get rid of parentheses

12x-8.5x+40+42=0

We add all the numbers together, and all the variables

3.5x+82=0

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

3.5x=-82

x=-82/3.5

x=-23+1/2.3333333333333

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