21-4n=7+3n

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Solution for 21-4n=7+3n equation:



21-4n=7+3n
We move all terms to the left:
21-4n-(7+3n)=0
We add all the numbers together, and all the variables
-4n-(3n+7)+21=0
We get rid of parentheses
-4n-3n-7+21=0
We add all the numbers together, and all the variables
-7n+14=0
We move all terms containing n to the left, all other terms to the right
-7n=-14
n=-14/-7
n=+2

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