180-x+90-x=140

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Solution for 180-x+90-x=140 equation: 



180-x+90-x=140

We move all terms to the left:

180-x+90-x-(140)=0

We add all the numbers together, and all the variables

-2x+130=0

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

-2x=-130

x=-130/-2

x=+65

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