Problema Solution
Sandy has twenty-four $0.02, $0.37, and $0.39 stamps. The total value sandy has in stamps is $7.08. She has twice as many $0.02 stamps as $0.37 stamps. How many of each stamps does sandy have ?
Answer provided by our tutors
let
x = the number of $0.02 stamps
y = the number of $0.37 stamps
z = the number of $0.39 stamps
Sandy has twenty-four $0.02, $0.37, and $0.39 stamps
x + y + z = 24
The total value sandy has in stamps is $7.08
0.02x + 0.37y + 0.39z = 7.08
She has twice as many $0.02 stamps as $0.37 stamps
x = 2y
by solving the system of equations
x + y + z = 24
0.02x + 0.37y + 0.39z = 7.08
x = 2y
we find
x = 6 $0.02 stamps
y = 3 $0.37 stamps
z = 15 $0.39 stamps
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