-1=7-2x

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Solution for -1=7-2x equation: 



-1=7-2x

We move all terms to the left:

-1-(7-2x)=0

We add all the numbers together, and all the variables

-(-2x+7)-1=0

We get rid of parentheses

2x-7-1=0

We add all the numbers together, and all the variables

2x-8=0

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

2x=8

x=8/2

x=4

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