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Toby has 15 coins totaling $2.85. He has only quarters and dimes. How many of each type coin does he have?

Toby has 15 coins totaling $2.85. He has only quarters and dimes. How many of each type coin does he have?
asked 199k views
3 votes
Toby has 15 coins totaling $2.85. He has only quarters and dimes. How many of each type coin does he have?

asked
User Rizan Zaky
by
8.1k points

1 Answer

6 votes
A) D + Q = 15
B) .10 D + .25Q = 2.85
Multiplying equation A by -.10
A) -.10 D -.10 Q = -1.5 Then adding this to B)
B) .10 D + .25Q = 2.85
.15Q = 1.35
9 Quarters
and if there are 15 coins there are 6 dimes



answered
User Shenglin Chen
by
7.6k points
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