Carly o direla tlelase ya gagwe ya botaki di-cupcake le di-brownie. O dirile di-brownie di le mmalwa ka pedi go feta palo ya di-cupcake tse di menotsweng gararo. Fa tlelase ya ga Carly e na le batho ba le batlhano mme motho mongwe le mongwe a bona di-treats di le pedi, Carly o dirile di-cupcake di le kae? 

To make a call from a payphone, you must pay $0.25 for each minute of your call. After 16 minutes, that price drops to $0.2 per minute. How much would a 36-minute call cost?
Sa ntlha, bona gore Carly o dirile di-treats di le kae ka go tlhomaganya palo ya batho mo tlelaseng le palo ya di-treats tse motho a di bonang: Batho ba le 5 * Di-treats di le 2/motho = <<5*2=10>>Di-treats di le 10
Morago ga moo, tlhalosa palo ya di-brownies go ya ka palo ya di-cupcake go ya ka tshedimosetso ya bothata: b = 3c - 2, moo b e leng palo ya di-brownies mme c e le palo ya di-cupcake
Re a itse gore b + c = 10, palo yotlhe ya di-treats, jalo jaanong re ka tsenya mo boemong jwa b go tswa kgatong e e fetileng: 3c - 2 + c = 10
Jaanong re kopanya mefuta e e tshwanang go bona 4c - 2 = 10
Re tlhakanya bobedi mo matlhakoreng a a mabedi a equation go bona 4c = 12
Kgabagare, re kgaoganya matlhakore a a mabedi ka 4 go bona c = 3
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First 16 minutes would be a cost of 16 * 0.25 = $<<16*0.25=4>>4.
After that, there are 36 - 16 = <<36-16=20>>20 minutes of the call left.
And these 20 minutes cost 20 * 0.2 = $<<20*0.2=4>>4.
So in total, the 36-minute call would cost 4 + 4 = $8.
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