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120=38.31+0.50x
We move all terms to the left:
120-(38.31+0.50x)=0
We add all the numbers together, and all the variables
-(0.50x+38.31)+120=0
We get rid of parentheses
-0.50x-38.31+120=0
We add all the numbers together, and all the variables
-0.5x+81.69=0
We move all terms containing x to the left, all other terms to the right
-0.5x=-81.69
x=-81.69/-0.5
x=163+0.19/0.5
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