Problema Solution
A coin box contains $26.50 in dimes and quarters. There are 157 coins altogether. How many of each type of coin are in the box?
Answer provided by our tutors
let x the number of dimes and y the number of quarters
Then as text says
x*0.1+y*0.25 =26.50
x+y=157
10x+25y =2650
x+y=157
10x+25y =2650
10x+10y =1570
substracting
15y =1080
y =72
x =157-72
x=85