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279=0.5x+x
We move all terms to the left:
279-(0.5x+x)=0
We add all the numbers together, and all the variables
-(+1.5x)+279=0
We get rid of parentheses
-1.5x+279=0
We move all terms containing x to the left, all other terms to the right
-1.5x=-279
x=-279/-1.5
x=+186
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