SOLUTION: The box currently contains 28 coins consisting of pennies, dimes, quarters, the number of pennies is equal to the number of dimes, the total value is 1.93 how many of each denomina

Question 850786: The box currently contains 28 coins consisting of pennies, dimes, quarters, the number of pennies is equal to the number of dimes, the total value is 1.93 how many of each denomination of coins does he have?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
= number of pennies
= number of dimes
= number of quarters
---------------------------
(1)
(2)
(3) ( in cents )
--------------------------------------
There are 3 unknowns and 3 equations,
so it's solvable
Multiply both sides of (1) by and
subtract (3) from (1)
(1)
(3)

and, since ,

and
(1)
(1)
(1)
(1)
----------------------
He has:
13 pennies
13 dimes
2 quarters
-----------
check:
(3)
(3)
(3)
(3)
OK
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