Erika o boloka madi a go reka laptop e ntšhwa. Laptop e a e batlang e ja $600. Morekisi o mmoditse gore fa a ka rekisa ya gagwe e kgologolo, tlhwatlhwa ya e ntšhwa e tla fokotsega ka $200. O akanya gore ke tumalano e ntle mme o a dumela. O setse a na le madi a a bolokileng mo bekeng ya gagwe, mme gape o dueletswe $150 beke eno ya tiro ya gagwe ya nakwana. Mmagwe o dumela go mo fa $80 go mo thusa. Fa jaanong Erika a tlhoka fela $50 go reka laptop, o ne a na le bokae mo bekeng ya gagwe?

If it takes 3 kangaroos traveling at the same speed a total of 18 hours to travel across a highway, how many hours will it take four turtles, each traveling at half the speed of a kangaroo, to do so?
Go rekisa laptop e kgologolo go fokoditse tlhwatlhwa ya e ntšhwa go nna $600 – $200 = $<<600-200=400>>400 dollars.
Re a itse gore ga a ise a nne le madi otlhe, ka jalo o na le $400 – $50 = $<<400-50=350>>350 dollars.
A mang a madi a a tswa kwa go mmagwe, ka jalo madi a a neng a na le one e ne e le $350 – $80 = $<<350-80=270>>270. 
Fa re ntsha dituelo tsa gagwe tsa tiro ya nakwana, re bona gore o ne a na le $270 – $150 = $<<270-150=120>>120 mo bekeng ya gagwe. 
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If it takes 3 kangaroos traveling at the same speed, a total of 18 hours to travel across a highway, one kangaroo takes 18/3= <<18/3=6>>6 hours to cross the highway.
A turtle traveling at half the speed of a kangaroo will take 2*6 = <<2*6=12>>12 hours to cross the highway.
Four turtles will take a total of 4*12 = <<4*12=48>>48 hours to travel across the highway.
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