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30-01-2018
Mathematics

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Item 17 There were nn signers of the Declaration of Independence. The oldest was Benjamin Franklin, who was yy years old. 7 is 10% of yy and nn is 80% of yy. How many signers were there?

Respuesta :

30-01-2018

7 is 10% of yy then we get the equation :
0.1*yy=7 so yy=7/0.1=70.
also,
nn=0.8*yy.
so nn=0.8*70=56.
There were 56 signers then.

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