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Kaitlyn had 12a+21 marbles. she gave one third of the marbles to her friend john. how many marbles does she have left

Respuesta :

csteenson006
33a is the answer cause 12+21=33 and you add the variable
toporc
She has two thirds of the marbles left after giving one third of them to John. The amount of marbles she has left is found from:
[tex]\frac{2}{3}(12a+21)=8a+14[/tex]
The answer is: 8a + 14 marbles.