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287=78.2+0.5x
We move all terms to the left:
287-(78.2+0.5x)=0
We add all the numbers together, and all the variables
-(0.5x+78.2)+287=0
We get rid of parentheses
-0.5x-78.2+287=0
We add all the numbers together, and all the variables
-0.5x+208.8=0
We move all terms containing x to the left, all other terms to the right
-0.5x=-208.8
x=-208.8/-0.5
x=417+0.30000000000001/0.5
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