6+3(n-1)=18

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Solution for 6+3(n-1)=18 equation: 



6+3(n-1)=18

We move all terms to the left:

6+3(n-1)-(18)=0

We add all the numbers together, and all the variables

3(n-1)-12=0

We multiply parentheses

3n-3-12=0

We add all the numbers together, and all the variables

3n-15=0

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

3n=15

n=15/3

n=5

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