Problema Solution
a coin purse contains a mixture of 34 coins in dimes and quaters. The coins have a total value of $7.15, or 715 cents. Determine the number of dimes and the number of quaters in the purse.
Answer provided by our tutors
let no of dimes be x and no of quaters be y
10x+25y=715
x+y=34 multiply by 25
10x+25y=715
25x+25y=850
subtracting we get,
15x=135
x=135/15 =9
hence x=9 and y=34-9=25