x+70=2x-20

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Solution for x+70=2x-20 equation: 



x+70=2x-20

We move all terms to the left:

x+70-(2x-20)=0

We get rid of parentheses

x-2x+20+70=0

We add all the numbers together, and all the variables

-1x+90=0

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

-x=-90

x=-90/-1

x=+90

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