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120=x*130
We move all terms to the left:
120-(x*130)=0
We add all the numbers together, and all the variables
-(+x*130)+120=0
We get rid of parentheses
-x*130+120=0
Wy multiply elements
-130x+120=0
We move all terms containing x to the left, all other terms to the right
-130x=-120
x=-120/-130
x=12/13
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