Question 1205418: If Zaire has 4 times as many quarters as dimes and they have a combined value of $4.40, how many of each coin does he have? Found 4 solutions by ikleyn, MathLover1, Edwin McCravy, josgarithmetic:Answer by ikleyn(52781) (Show Source):
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If Zaire has 4 times as many quarters as dimes and they have a combined value
of $4.40, how many of each coin does he have?
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Group the coins in sets containing 4 quarters and 1 dime.
Each group is worth 4*25 + 10 = 110 cents.
In all, there are = 4 such groups.
ANSWER. There are 4*4 = 16 quarters and 4 dimes.
Solved.
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The grouping method is a perfect way to solve such problems MENTALLY.
let quarters be and dimes
if Zaire has times as many quarters as dimes, we have
....eq.1
if a combined value of $,we have
...eq.2, substitute from eq.1
....solve for
go to
....eq.1, substitute
Zaire has quarters and dimes.