Dave had 40 marbles. Junjun has 2 1/5 more than Dave's marbles. How many marbles do they have altogether?

Correct answer:

x =  128

Step-by-step explanation:

d=40 k=251=2+51=52 5+1=510+1=511=251=2.2  j=k d=511 40=511 40=5440=88  x=d+j=40+88=128

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