3(5+n)=21n=

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Solution for 3(5+n)=21n= equation: 



3(5+n)=21n=

We move all terms to the left:

3(5+n)-(21n)=0

We add all the numbers together, and all the variables

3(n+5)-21n=0

We add all the numbers together, and all the variables

-21n+3(n+5)=0

We multiply parentheses

-21n+3n+15=0

We add all the numbers together, and all the variables

-18n+15=0

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

-18n=-15

n=-15/-18

n=5/6

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