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30x=90/100
We move all terms to the left:
30x-(90/100)=0
We add all the numbers together, and all the variables
30x-(+90/100)=0
We get rid of parentheses
30x-90/100=0
We multiply all the terms by the denominator
30x*100-90=0
Wy multiply elements
3000x-90=0
We move all terms containing x to the left, all other terms to the right
3000x=90
x=90/3000
x=3/100
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