(x+10)+(x-30)=120

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Solution for (x+10)+(x-30)=120 equation: 



(x+10)+(x-30)=120

We move all terms to the left:

(x+10)+(x-30)-(120)=0

We get rid of parentheses

x+x+10-30-120=0

We add all the numbers together, and all the variables

2x-140=0

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

2x=140

x=140/2

x=70

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