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(100x-900)*130/100=125x-900
We move all terms to the left:
(100x-900)*130/100-(125x-900)=0
We get rid of parentheses
(100x-900)*130/100-125x+900=0
We multiply all the terms by the denominator
(100x-900)*130-125x*100+900*100=0
We add all the numbers together, and all the variables
(100x-900)*130-125x*100+90000=0
We multiply parentheses
13000x-125x*100-117000+90000=0
Wy multiply elements
13000x-12500x-117000+90000=0
We add all the numbers together, and all the variables
500x-27000=0
We move all terms containing x to the left, all other terms to the right
500x=27000
x=27000/500
x=54
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