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.3x=15000+.1x
We move all terms to the left:
.3x-(15000+.1x)=0
We add all the numbers together, and all the variables
.3x-(.1x+15000)=0
We get rid of parentheses
.3x-.1x-15000=0
We add all the numbers together, and all the variables
0.2x-15000=0
We move all terms containing x to the left, all other terms to the right
0.2x=15000
x=15000/0.2
x=75000
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