-1(-)7x=15x+21

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Solution for -1(-)7x=15x+21 equation: 



-1(-)7x=15x+21

We move all terms to the left:

-1(-)7x-(15x+21)=0

We add all the numbers together, and all the variables

-107x-(15x+21)=0

We get rid of parentheses

-107x-15x-21=0

We add all the numbers together, and all the variables

-122x-21=0

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

-122x=21

x=21/-122

x=-21/122

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