8=7x+-20

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Solution for 8=7x+-20 equation: 



8=7x+-20

We move all terms to the left:

8-(7x+-20)=0

We add all the numbers together, and all the variables

-(7x-20)+8=0

We get rid of parentheses

-7x+20+8=0

We add all the numbers together, and all the variables

-7x+28=0

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

-7x=-28

x=-28/-7

x=+4

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