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x-(x*10/100)=1291
We move all terms to the left:
x-(x*10/100)-(1291)=0
We add all the numbers together, and all the variables
x-(+x*10/100)-1291=0
We get rid of parentheses
x-x*10/100-1291=0
We multiply all the terms by the denominator
x*100-x*10-1291*100=0
We add all the numbers together, and all the variables
x*100-x*10-129100=0
Wy multiply elements
100x-10x-129100=0
We add all the numbers together, and all the variables
90x-129100=0
We move all terms containing x to the left, all other terms to the right
90x=129100
x=129100/90
x=1434+4/9
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