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x+30x/100=1300
We move all terms to the left:
x+30x/100-(1300)=0
We multiply all the terms by the denominator
x*100+30x-1300*100=0
We add all the numbers together, and all the variables
30x+x*100-130000=0
Wy multiply elements
30x+100x-130000=0
We add all the numbers together, and all the variables
130x-130000=0
We move all terms containing x to the left, all other terms to the right
130x=130000
x=130000/130
x=1000
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