Question 139995
let x="number of quarters


"there are 7 less dimes than there are quearters" __ x-7


"the value of the collection is $3.85" __ x(.25)+(x-7)(.10)=3.85


distributing and multiplying by 100 __ 25x+10x-70=385


adding 70 __ 35x=455


dividing by 35 __ x=13