Problema Solution
a coin collection contains 30 coins in nickles, dimes and quarters.There are three more dimes than nickles. the value of the coins is $3.55. Find the number of quarters in the collection
Answer provided by our tutors
SUPPOSE X = NICKELS
X+ 3 = DIMES
Y = QUARTERS
X+X+3+Y=30 =>2X+Y=27 ------1
0.05X + 0.1 (X+3) +0.25Y = 3.55 => 0.15 X + 0.25 Y = 3.55 -0.3 =3.25 --------2
2 X 4
0.6 X + Y = 13
1-2
1.4X = 14
X= 10
Y = 7