7x+70=x-20

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Solution for 7x+70=x-20 equation: 



7x+70=x-20

We move all terms to the left:

7x+70-(x-20)=0

We get rid of parentheses

7x-x+20+70=0

We add all the numbers together, and all the variables

6x+90=0

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

6x=-90

x=-90/6

x=-15

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