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16.5=3.5-x
We move all terms to the left:
16.5-(3.5-x)=0
We add all the numbers together, and all the variables
-(-1x+3.5)+16.5=0
We get rid of parentheses
1x-3.5+16.5=0
We add all the numbers together, and all the variables
x+13=0
We move all terms containing x to the left, all other terms to the right
x=-13
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