word problem(algebra)
posted by kimi on .
a shopkeeper bought 16 boxes of pens.each box contained m pens.10 pens were sold on the first day.
(a) how many pens were left after the first day?give ur answer in terms of m.
(b) if m=5,how many pens were left after the first day?

a. Pt = 16boxes * m pens/box = 16m = Total # of pens bought.
a. Bal. = 16m  10.
b. Bal. = 16*5  10 = 70 pens left. 
Boxes of pens = 16m
Sold pens = 10
A.) 16m  10
B.) 16(5)  10 
Boxes of pens = 16m
Sold pens = 10
A.) 16m  10
B.) 16(5)  10
80  10
= 70