Answer on Calculus Question for ong
N - the unknown number of erasers.
J + N = 3(M - N)
J + N = 3M - 3N
4N = 3M - J
N = (3M - J)/4 = (3*20 - 24)/4 = 9.
So, Muthu must give 9 erasers to Jasmine.
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