Rraagwe Melanie o butse polasi ya diphologolo ka dikgomo di le 50 le dikoko di le 20.  Khampani ya Milkie Cows Limited e mo tlisetsa dikgomo di le 20 ka letsatsi mme  Khampani ya Broilers Limited e mo tlisetsa dikoko di le 10 ka letsatsi, beke tse tharo.  Ke palo e fe kana ka botlalo ya diphologolo tse di mo polasing morago ga dibeke tse tharo? 

Bob has a certain number of marbles. If he receives 2 dozen more marbles, he will have 60 marbles. If he loses 10 of the marbles he has, how many marbles will Bob have?
Diphologolo di ne di tlisiwa mo polasing dibeke di le tharo, e leng 3*7 = <<3*7=21>>21 malatsi.
Palo ya dikgomo tse di tlisiwang ke ba Milkie ke 21*20 = <<21*20=420>>420 dikgomo.
Palo ya dikoko tse di tlisiwang ke ba Broilers ke 10*21 = <<10*21=210>>210 dikoko.
Palo ya diphologolo tsotlhe tse di mo polasing ke 50+20+210+420 = <<50+20+210+420=700>>700 diphologolo.
#### 700

Let B be the number of marbles Bob starts with.
2 dozen marbles is 2 * 12 = <<2*12=24>>24 marbles.
So after receiving 2 dozen more marbles, we know B + 24 = 60.
This means B = 60 - 24 = <<60-24=36>>36.
Bob ends with 36 - 10 = <<36-10=26>>26 marbles.
#### 26