-30-2x=70-7x

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Solution for -30-2x=70-7x equation: 



-30-2x=70-7x

We move all terms to the left:

-30-2x-(70-7x)=0

We add all the numbers together, and all the variables

-2x-(-7x+70)-30=0

We get rid of parentheses

-2x+7x-70-30=0

We add all the numbers together, and all the variables

5x-100=0

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

5x=100

x=100/5

x=20

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