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3. Rob has 40 coins, all dimes and quarters, worth $7.60. How many dimes and how many quarters does he have?
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5 votes
3. Rob has 40 coins, all dimes and quarters, worth $7.60. How many dimes and how many quarters

does he have?

User Lbrndnr
by
7.5k points

1 Answer

1 vote
x = quarters
y = dimes
x + y = 40
25x + 10y = 760
25x + 10(40 - x) = 760
25x + 400 - 10x = 760
15x + 400 = 760
15x = 360
x = 24
y = 16
Rob has 24 quarters and 16 dimes

User GuilPejon
by
7.4k points
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