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(90x/100)+(80*2x/100)=37.50
We move all terms to the left:
(90x/100)+(80*2x/100)-(37.50)=0
We add all the numbers together, and all the variables
(+90x/100)+(+80*2x/100)-(37.5)=0
We add all the numbers together, and all the variables
(+90x/100)+(+80*2x/100)-37.5=0
We get rid of parentheses
90x/100+80*2x/100-37.5=0
We multiply all the terms by the denominator
90x+80*2x-(37.5)*100=0
We add all the numbers together, and all the variables
90x+80*2x-3750=0
Wy multiply elements
90x+160x-3750=0
We add all the numbers together, and all the variables
250x-3750=0
We move all terms containing x to the left, all other terms to the right
250x=3750
x=3750/250
x=15
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