-1=7+9x

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Solution for -1=7+9x equation: 



-1=7+9x

We move all terms to the left:

-1-(7+9x)=0

We add all the numbers together, and all the variables

-(9x+7)-1=0

We get rid of parentheses

-9x-7-1=0

We add all the numbers together, and all the variables

-9x-8=0

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

-9x=8

x=8/-9

x=-8/9

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