3n+3(4n+15)=-21

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Solution for 3n+3(4n+15)=-21 equation: 



3n+3(4n+15)=-21

We move all terms to the left:

3n+3(4n+15)-(-21)=0

We add all the numbers together, and all the variables

3n+3(4n+15)+21=0

We multiply parentheses

3n+12n+45+21=0

We add all the numbers together, and all the variables

15n+66=0

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

15n=-66

n=-66/15

n=-4+2/5

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