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x+.3x=128140
We move all terms to the left:
x+.3x-(128140)=0
We add all the numbers together, and all the variables
1.3x-128140=0
We move all terms containing x to the left, all other terms to the right
1.3x=128140
x=128140/1.3
x=98569+0.29999999998836/1.3
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