3(7n+5)-n=155

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Solution for 3(7n+5)-n=155 equation: 



3(7n+5)-n=155

We move all terms to the left:

3(7n+5)-n-(155)=0

We add all the numbers together, and all the variables

-1n+3(7n+5)-155=0

We multiply parentheses

-1n+21n+15-155=0

We add all the numbers together, and all the variables

20n-140=0

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

20n=140

n=140/20

n=7

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