Problema Solution
a box contains 30 coins in nickel and in dimes, worth $2.40, how many of each kind are there?
Answer provided by our tutors
X+Y = 30
.05X+.1Y = 2.4
OR 5X+10Y = 240
OR X+2Y = 48
COMPARING , WE GET
30-Y = 48-2Y
Y = 18
SO X = 12
SO 12 NICKEL , 18 DIMES