Question

10) 3(n + 3) - 9 = 15 solve for n​

Answer 1

n=5

Explanation:

We can first expand the 3(n+3) into 3n + 3*3. The equation now looks like this.
`3n+9-9=15`. 9-9=0, so now it is just
`3n=15`. We divide both sides by 3, and get n=5.

Answer 2

n = 5

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