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548.28=220+1.16x
We move all terms to the left:
548.28-(220+1.16x)=0
We add all the numbers together, and all the variables
-(1.16x+220)+548.28=0
We get rid of parentheses
-1.16x-220+548.28=0
We add all the numbers together, and all the variables
-1.16x+328.28=0
We move all terms containing x to the left, all other terms to the right
-1.16x=-328.28
x=-328.28/-1.16
x=+283
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