-x-20=20+7x

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Solution for -x-20=20+7x equation: 



-x-20=20+7x

We move all terms to the left:

-x-20-(20+7x)=0

We add all the numbers together, and all the variables

-x-(7x+20)-20=0

We add all the numbers together, and all the variables

-1x-(7x+20)-20=0

We get rid of parentheses

-1x-7x-20-20=0

We add all the numbers together, and all the variables

-8x-40=0

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

-8x=40

x=40/-8

x=-5

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