24 + 12n + 36 - 36n = -60

Explanation:

Step1: Combine like - terms

$24 + 36+12n-36n=-60$ $60 - 24n=-60$

Step2: Isolate the term with the variable

Subtract 60 from both sides: $60 - 24n-60=-60 - 60$ $-24n=-120$

Step3: Solve for n

Divide both sides by - 24: $n=\frac{-120}{-24}$ $n = 5$

Answer:

$n = 5$