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0.50x+0.3(30)=39.5
We move all terms to the left:
0.50x+0.3(30)-(39.5)=0
We add all the numbers together, and all the variables
0.50x-39.17=0
We move all terms containing x to the left, all other terms to the right
0.50x=39.17
x=39.17/0.50
x=78+0.17/0.50
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