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x+.0815x=500
We move all terms to the left:
x+.0815x-(500)=0
We add all the numbers together, and all the variables
1.0815x-500=0
We move all terms containing x to the left, all other terms to the right
1.0815x=500
x=500/1.0815
x=462+0.347/1.0815
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