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.04x+.05(2x)=210
We move all terms to the left:
.04x+.05(2x)-(210)=0
We add all the numbers together, and all the variables
0.092x-210=0
We move all terms containing x to the left, all other terms to the right
0.092x=210
x=210/0.092
x=2282+0.056/0.092
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