Debra saved only dimes and nickels in her bank. When she last counted the coins, she noticed there were twice as many dimes as nickels. She has $4.75 in her bank. how many dimes did she have in her bank?
Let n be the number of nickels and d be the number of dimes Then d=2n (given) Therefore d*(0.1)+n*(0.05)=4.75 Then 2n*(0.1)+n*(0.05)=4.75 Then n*(0.2)+n*(0.05)=4.75 Then n*(0.2+0.05)=4.75 Then n*0.25=4.75 Then n = 4.75÷0.25 = 19 Then d =2n = 38
