Tue Nov 03, 2015 8:41 am by tartle |
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If a can of soda and stick of gum costs $1.10, and a can of soda costs $1 more than a stick of gum, how much does the stick of gum cost? |
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Mon May 02, 2016 9:53 pm by wanderingmomentum |
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5 cents |
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Thu Jul 14, 2016 2:32 pm by bathfilms |
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S + G = 1.10
but S = G + 1
so (G + 1) + G = 1.10
i.e. 2G + 1 = 1.10
2G = 0.10
G = 0.05
So gum costs 5 cents |
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