If you were to correctly simplify this equation, the answer would be a negative.
The answer is: n = -5
Here's how I got my answer:
Step 1: Add 3 to both sides. Which leaves us with [tex] -9n=42+3 [/tex]
Step 2: Simplify [tex] 42+3 [/tex] to 45. Which leaves us with [tex] -9n = 45 [/tex]
Step 3: Divide both sides by -9. Which leaves us with [tex] n = -45/9 [/tex]
Step 4: Simplify [tex] -45/9 [/tex], to get your answer, n = -5.