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n+0.9=0.45n
We move all terms to the left:
n+0.9-(0.45n)=0
We add all the numbers together, and all the variables
n-(+0.45n)+0.9=0
We get rid of parentheses
n-0.45n+0.9=0
We add all the numbers together, and all the variables
0.55n+0.9=0
We move all terms containing n to the left, all other terms to the right
0.55n=-0.9
n=-0.9/0.55
n=-1+0.35/0.55
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