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.5x+.35(70)=39.5
We move all terms to the left:
.5x+.35(70)-(39.5)=0
We add all the numbers together, and all the variables
.5x-39.143=0
We move all terms containing x to the left, all other terms to the right
.5x=39.143
x=39.143/.5
x=78+0.143/.5
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