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

a. −4
b. −2
c. 2
d. 4
Can someone please give me a step by step I am really struggling <3

b. -2

Step-by-step explanation:

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

[To simplify, multiply 2 with n and 2]

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

5n + 4 = 9n + 12

[Add 2n and 3n]

5n + 4 - 9n = 12

[Sign of 9n would change when it's moved from one side of the = to the other]

5n - 9n = 12 - 4

[Similarly, sign of 4 would change from + to -]

- 4n = 8

n = 8/-4

n = -2

Hope this helps :D

i think it would be 42cm