Question 608050
peter has only pennies, Norma only nickels, Diane only dimes, and Quincy only quarters.
 Peter and Norma have the same number of coins, and Diane and Quincy have the same number of coins.
 What is the least number of coins they can all have if the sum of their money is $4.87
:
p = n
d = q
:
.01p + .05n + .10d + .25q = 4.87
replace p with n
replace d with q
.01n + .05n + .10q + .25q = 4.87
.06n + .35q = 4.87
Multiply by 100 to get rid of the decimals
6n + 35q = 487
6n = -35q + 487
n = {{{-35/6}}}q + {{{487/6}}}
the least integer solution for this equation (used the table on a Ti83)
q = 5, n = 52
see if that works
.01(52) = 0.52
.05(52) = 2.60
.10(5) =  0.50
.25(5) =  1.25
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totals: 4.87