Mathematics, 10.12.2020 01:10 jenni333
The equations 20x +12y = 140 and 45x +20y = 280 represent the cost for lunch and dinner for a family eating out on vacation. If x is the number of adults and y is the number of children, how many adults are in the family?
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The equations 20x +12y = 140 and 45x +20y = 280 represent the cost for lunch and dinner for a family...
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