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0.05n+0.10(n+4)=2.25
We move all terms to the left:
0.05n+0.10(n+4)-(2.25)=0
We add all the numbers together, and all the variables
0.05n+0.10(n+4)-2.25=0
We multiply parentheses
0.05n+0.1n+0.4-2.25=0
We add all the numbers together, and all the variables
0.15n-1.85=0
We move all terms containing n to the left, all other terms to the right
0.15n=1.85
n=1.85/0.15
n=12+0.05/0.15
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