What is the value of n in the equation 3n + 2(n + 2) = 9n + 12?
−4
−2
2
4

−2

Step-by-step explanation:

3n + 2(n + 2) = 9n + 12

Distribute

3n +2n +4 = 9n+12

5n+4 = 9n+12

Subtract 5n from each side

5n -5n+4 = 9n-5n+12

4 = 4n+12

Subtract 12 from each side

4-12 = 4n+12-12

-8 = 4n

Divide by 4

-8/4 = 4n/4

-2 = n

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24