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x*0.2+x=15000
We move all terms to the left:
x*0.2+x-(15000)=0
We add all the numbers together, and all the variables
x+x*0.2-15000=0
Wy multiply elements
x+0.2x-15000=0
We add all the numbers together, and all the variables
1.2x-15000=0
We move all terms containing x to the left, all other terms to the right
1.2x=15000
x=15000/1.2
x=12500
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