N - 9 = 5 + 4N
N - 4N = 5 + 9
-3N = 14
the number (N) is -14/3
Answer:
4
Step-by-step explanation:

2x+8x=30. x= #of pens
10x=30. combine like terms
x=3. divide by 10 to isolate (get by itself) x
2(3)=6. the # of white pens are represented by 2x
6 white pens
hope this helped!
9/2 mph. You would need to multiply both by six to get exact mph, and three fourths times six is 18/4=9/2=4.5 mph