If Ashley sold a total of 155 cups of lemonade for $265 how many cups of each type did she sell

Question

Small cups were 1.25 and large cups were 2.25

Answer 1

Let S = small cups and L = large cups

S + L =155 equation 1

1.25S + 2.25L = 265 equation 2

Multiply equation 2 by 4: 5S + 9L = 1060 equation 3

Multiply equation 1 by 5: 5S + 5L = 775 equation 4

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