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x+(x*28/100)=100
We move all terms to the left:
x+(x*28/100)-(100)=0
We add all the numbers together, and all the variables
x+(+x*28/100)-100=0
We get rid of parentheses
x+x*28/100-100=0
We multiply all the terms by the denominator
x*100+x*28-100*100=0
We add all the numbers together, and all the variables
x*100+x*28-10000=0
Wy multiply elements
100x+28x-10000=0
We add all the numbers together, and all the variables
128x-10000=0
We move all terms containing x to the left, all other terms to the right
128x=10000
x=10000/128
x=78+1/8
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