(30x-30)+(40x+70)=180

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Solution for (30x-30)+(40x+70)=180 equation: 



(30x-30)+(40x+70)=180

We move all terms to the left:

(30x-30)+(40x+70)-(180)=0

We get rid of parentheses

30x+40x-30+70-180=0

We add all the numbers together, and all the variables

70x-140=0

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

70x=140

x=140/70

x=2

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