-8x+6=-7x+21

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Solution for -8x+6=-7x+21 equation: 



-8x+6=-7x+21

We move all terms to the left:

-8x+6-(-7x+21)=0

We get rid of parentheses

-8x+7x-21+6=0

We add all the numbers together, and all the variables

-1x-15=0

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

-x=15

x=15/-1

x=-15

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