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.20x+0.35(30)=27.5
We move all terms to the left:
.20x+0.35(30)-(27.5)=0
We add all the numbers together, and all the variables
.20x-27.147=0
We move all terms containing x to the left, all other terms to the right
.20x=27.147
x=27.147/.20
x=135+0.147/.20
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