0.60n+0.75n+0.80n=12.9

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Solution for 0.60n+0.75n+0.80n=12.9 equation: 



0.60n+0.75n+0.80n=12.9

We move all terms to the left:

0.60n+0.75n+0.80n-(12.9)=0

We add all the numbers together, and all the variables

2.15n-12.9=0

We move all terms containing n to the left, all other terms to the right

2.15n=12.9

n=12.9/2.15

n=6+1.7763568394003E-15/2.15

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