-15=1+7x+5

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Solution for -15=1+7x+5 equation: 



-15=1+7x+5

We move all terms to the left:

-15-(1+7x+5)=0

We add all the numbers together, and all the variables

-(7x+6)-15=0

We get rid of parentheses

-7x-6-15=0

We add all the numbers together, and all the variables

-7x-21=0

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

-7x=21

x=21/-7

x=-3

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