-7x=31-8x-31

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Solution for -7x=31-8x-31 equation: 



-7x=31-8x-31

We move all terms to the left:

-7x-(31-8x-31)=0

We add all the numbers together, and all the variables

-7x-(-8x)=0

We get rid of parentheses

-7x+8x=0

We add all the numbers together, and all the variables

x=0

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