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0.12n+0.06(4500-n)=0.07(4500)
We move all terms to the left:
0.12n+0.06(4500-n)-(0.07(4500))=0
We add all the numbers together, and all the variables
0.12n+0.06(-1n+4500)-(0.0745)=0
We add all the numbers together, and all the variables
0.12n+0.06(-1n+4500)-0.0745=0
We multiply parentheses
0.12n-0.06n+270-0.0745=0
We add all the numbers together, and all the variables
0.06n+269.9255=0
We move all terms containing n to the left, all other terms to the right
0.06n=-269.9255
n=-269.9255/0.06
n=-4498+0.0455/0.06
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