Question 86693
Jill has $3.50 in nickels and dimes. If she has 50 coins, how many of each type of coin does she have?
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Let # of nickels be "x" ; Value of these is 5x cents.
# of dimes is "50-x" ; Value of these is 10*(50-x) = 500-10x cents
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EQUATION:
value + value = 350 cents
5x + 500-10x = 350
-5x = -150
x=30 (number of nickels)
50-x = 20 (number of dimes)
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Cheers,
Stan H.