8x-31=-12x-21

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Solution for 8x-31=-12x-21 equation: 



8x-31=-12x-21

We move all terms to the left:

8x-31-(-12x-21)=0

We get rid of parentheses

8x+12x+21-31=0

We add all the numbers together, and all the variables

20x-10=0

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

20x=10

x=10/20

x=1/2

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