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A drink costs 3 dollars and a sandwich costs 5 dollars. You buy 10 items (some combination of drinks and sandwiches) and you spend 42 dollars.How many of each item did you buy?

 Jan 13, 2020
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Let # drinks = x

  then  10 -x  is # sandwiches

 

$ 3 * x   +  $ 5 * (10-x)    = $ 42       solve for 'x' which is the number of drinks ....then #  sandwiches = 10 - x

 Jan 13, 2020

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