-40=-70+x

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Solution for -40=-70+x equation: 



-40=-70+x

We move all terms to the left:

-40-(-70+x)=0

We add all the numbers together, and all the variables

-(x-70)-40=0

We get rid of parentheses

-x+70-40=0

We add all the numbers together, and all the variables

-1x+30=0

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

-x=-30

x=-30/-1

x=+30

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