Answer:
n = 6
Step-by-step explanation:
First we would plug the values with n, starting with 4.
[tex]3*4 + 4*4 = 28[/tex]
So A. is not an option
Now we try 2.
[tex]3*2 + 4*2 = 14[/tex]
B is NOT an option
Now we try 7
[tex]3*7 + 4*7 = 49[/tex]
Now we try 21
[tex]3*21 + 4*21 = 147[/tex]
Now we check what was closest...7
so we try numbers less than 7
n is = to 6
Answer:
n=6
Step-by-step explanation:
3n+4n = 42
(3+4)n = 42
7n = 42
Dividing both sides by the coefficient of n, which is 7, we have
n = 42/7
n = 6
