Question

12 − (n − 6) = 3(n + 5) what is n ?

Answer 1

`12 - (n - 6) = 3(n + 5) \\ 12 - n + 6 = 3n + 15 \\ 3n + n = 12 + 6 - 15 \\(3 + 1)n = 18 - 15 \\ 4n = 3 \\ \boxed{n = (3)/(4) }`

• n = 3/4 is the right answer.

Answer 2

`n=(3)/(4)`

Explanation:

`12-(n-6)=3(n+5)\\12-n+6=3n+15\\18-n=3n+15\\18-n+n=3n+15+n\\18=4n+15\\18-15=4n+15-15\\3=4n\\(3)/(4)=(4n)/(4)\\(3)/(4)=n`