3(2n-1)=15

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Solution for 3(2n-1)=15 equation: 



3(2n-1)=15

We move all terms to the left:

3(2n-1)-(15)=0

We multiply parentheses

6n-3-15=0

We add all the numbers together, and all the variables

6n-18=0

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

6n=18

n=18/6

n=3

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