add 6a and 5a and get 11a
then:
11a=-11
a=-1
Answer:
GK = 20
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
Let x = # of boxes of felt-tip pens.
(x)(3.44)+(4x)(4.41) = 63.24
21.08x = 63.24
x = 3
Because x = 3, the man bought 3 boxes of felt-tip pens and 12 boxes of ballpoint pens.
The answer is D, none of these