<PRE><B>Question 1122462</B>
-------------------------------------------------
Lily has a piggy bank with 100 coins in dimes in pennies she has a total of $7.57 in the piggy bank
-----------------------------------------------


1 dime is  0.10 dollar.
1 penny is 0.01 dollar.


{{{system(d+p=100,0.1d+0.01p=7.57)}}}


Multiply the money equation, both sides, by 100 to eliminate the fractions or denominators.


{{{system(d+p=100,10d+p=757)}}}


You may want to use elimination first to directly solve for d.   
.
.</PRE>