21=2+4n+5n

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Solution for 21=2+4n+5n equation:



21=2+4n+5n
We move all terms to the left:
21-(2+4n+5n)=0
We add all the numbers together, and all the variables
-(9n+2)+21=0
We get rid of parentheses
-9n-2+21=0
We add all the numbers together, and all the variables
-9n+19=0
We move all terms containing n to the left, all other terms to the right
-9n=-19
n=-19/-9
n=2+1/9

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