Question 572915
let dimes be x
quarters = x+7
nickels = 4(x+7)

the value = $4.25 = 425cents

value equation
10x+25(x+7)+5*4(x+7)=425

10x+25x+175+20x+140=425

55x+315=425
55x= 425-315

55x=110
x= 2
2 dimes
quarters =(2+7)=9 
nickels = 4(x+7)=4*9=36
CHECK

36*5 + 9*25+2*10=
180+225+20=425