Posted by Mayette on Wednesday, September 19, 2012 at 4:24pm.
Let x = the number of singles
6 * 10 + x = 78
60 + x = 78
x = 78 - 60
x = 18
6x10=60
78-60=18 so the answer is 19
I meant 18
6x10=60
78-60=18 so the answer is 19
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