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0.14n+0.04(1200-n)=0.09(1200)
We move all terms to the left:
0.14n+0.04(1200-n)-(0.09(1200))=0
We add all the numbers together, and all the variables
0.14n+0.04(-1n+1200)-(0.0912)=0
We add all the numbers together, and all the variables
0.14n+0.04(-1n+1200)-0.0912=0
We multiply parentheses
0.14n-0.04n+48-0.0912=0
We add all the numbers together, and all the variables
0.1n+47.9088=0
We move all terms containing n to the left, all other terms to the right
0.1n=-47.9088
n=-47.9088/0.1
n=-479+0.0087999999999937/0.1
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