Answer:
3
Step-by-step explanation:
2 (n + 9) = 24 this is the equation
to solve for n (number):
2(n+9)=24 // Distribute the 2 into parentheses
2n + 18 = 24 // Subtract 18 on both sides of equal sign
- 18 -18
2n = 6 // Divide by 2 on both sides of equal sign
2 2
n = 3
Hope this helps :)