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DrJOKER
Hey
Here it is

We can do this exercise in two ways

1°) We can make an expression:

3 markers ———> 5,79$
13 markers ——> x $

So x = ( 13 x 5,79 )/ 3

2°) 3/5,79 = 13/x

So x = ( 13 x 5,79 )/ 3

Answer: C

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