Question
Tina has 13 as many erasers as Gabby. They have a total of 40 erasers. How many erasers must Gabby give to Tina so that they will have the same number of erasers?
4 m

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Tina has 13 as many erasers as Gabby. They have a total of 40 erasers. How many erasers must Gabby give to Tina so that they will have the same number of erasers?