180-x+90-x=130

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Solution for 180-x+90-x=130 equation: 



180-x+90-x=130

We move all terms to the left:

180-x+90-x-(130)=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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