Question 1033646
Call their numbers n and d.  Then we can write
n + d = 13
The value equation for them is
5n + 10d = 105
Now multiply the top equation by 5 and subtract from the bottom equation...we get
5n + 10d = 105
-(5n + 5d = 65)
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5d = 40
d = 8 dimes which means there are 13-8 =
n = 5 nickels