<PRE><B>Question 525621</B>

Let
Number of Nickels he has = x
Number of Dimes he has = x+5

Given
=====
Total Amount = $2.30=2.30*100=230 cents


(Number of Dimes)*10+(Numbr of Nickels)*5=230
(x+5)*10+x*5=230
10x+50+5x=230
15x=230-50
15x=180
15x/15=180/15
x=12


Number of Nickels he has = x = 12
Number of Dimes he has = x+5 = 12+5 = 17


Check
=====
12*5 + 10*17 = 230
60 + 170 = 230
230=230</PRE>