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0.5n+12n+1.5n=280.5n+12n+1.5n=28
We move all terms to the left:
0.5n+12n+1.5n-(280.5n+12n+1.5n)=0
We add all the numbers together, and all the variables
0.5n+12n+1.5n-(+294n)=0
We add all the numbers together, and all the variables
14n-(+294n)=0
We get rid of parentheses
14n-294n=0
We add all the numbers together, and all the variables
-280n=0
n=0/-280
n=0
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