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15000=x+0.07x
We move all terms to the left:
15000-(x+0.07x)=0
We add all the numbers together, and all the variables
-(+1.07x)+15000=0
We get rid of parentheses
-1.07x+15000=0
We move all terms containing x to the left, all other terms to the right
-1.07x=-15000
x=-15000/-1.07
x=14018+0.73999999999978/1.07
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