Problema Solution
Sanjit has a collection of quarters and dimes worth $3.70. He has a total of 19 coins. How many quarters and how many dimes does Sanjit have?
Answer provided by our tutors
25X + 10Y = 370
X + Y = 19
X = 19-Y
25(19-Y) + 10Y = 370
475 - 25Y + 10Y = 370
-15Y = -105
15Y = 105
Y = 7
X = 19-Y
X = 19-7
X=12
Therefore Sanjit has 7 Dimes ($0.70) and 12 quarters ($3.00).