Answer:
n = 5
Step-by-step explanation:
3(n + 3) - 9 = 15
Add 9 to each side
3(n + 3) - 9+9 = 15+9
3(n+3) = 24
Divide each side by 3
3/3(n+3) = 24/3
n+3 = 8
Subtract 3 from each side
n+3-3 = 8-3
n=5
We can first expand the 3(n+3) into 3n + 3*3. The equation now looks like this. [tex]3n+9-9=15[/tex]. 9-9=0, so now it is just [tex]3n=15[/tex]. We divide both sides by 3, and get n=5.
