21n+5=7n-5

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Solution for 21n+5=7n-5 equation: 



21n+5=7n-5

We move all terms to the left:

21n+5-(7n-5)=0

We get rid of parentheses

21n-7n+5+5=0

We add all the numbers together, and all the variables

14n+10=0

We move all terms containing n to the left, all other terms to the right

14n=-10

n=-10/14

n=-5/7

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