7+3(n-1)=40

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Solution for 7+3(n-1)=40 equation: 



7+3(n-1)=40

We move all terms to the left:

7+3(n-1)-(40)=0

We add all the numbers together, and all the variables

3(n-1)-33=0

We multiply parentheses

3n-3-33=0

We add all the numbers together, and all the variables

3n-36=0

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

3n=36

n=36/3

n=12

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