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Giuliana has 22 quarters and dollar coins worth a total of $10.75. Which equation can be used to find d, the number of dollar coins Giuliana has?
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Giuliana has 22 quarters and dollar coins worth a total of $10.75.

Which equation can be used to find d, the number of dollar coins Giuliana has?

User Hoha
by
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1 Answer

1 vote
Given:
22 quarters and dollar coins worth 10.75

quarters = 0.25
dollar = 1.00

q + d = 22
0.25q + d = 10.75

q = 22 - d
0.25(22-d) + d = 10.75

5.5 - 0.25d + d = 10.75
0.75d = 10.75 - 5.5
0.75d = 5.25
d = 5.25/0.75
d = 7
User Catleeball
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