21=5n-9

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Solution for 21=5n-9 equation:



21=5n-9
We move all terms to the left:
21-(5n-9)=0
We get rid of parentheses
-5n+9+21=0
We add all the numbers together, and all the variables
-5n+30=0
We move all terms containing n to the left, all other terms to the right
-5n=-30
n=-30/-5
n=+6

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