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6.3(4.3+2.5n)+2.1(n+3.7)=-18.69
We move all terms to the left:
6.3(4.3+2.5n)+2.1(n+3.7)-(-18.69)=0
We add all the numbers together, and all the variables
6.3(2.5n+4.3)+2.1(n+3.7)-(-18.69)=0
We add all the numbers together, and all the variables
6.3(2.5n+4.3)+2.1(n+3.7)+18.69=0
We multiply parentheses
12.6n+2.1n+27.09+7.77+18.69=0
We add all the numbers together, and all the variables
14.7n+53.55=0
We move all terms containing n to the left, all other terms to the right
14.7n=-53.55
n=-53.55/14.7
n=-3+6.5172413793103/10.137931034483
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