Marbles

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

Correct result:

x =  128

Solution:

d=40 k=215=2 5+15=115=2.2  j=k d=2.2 40=88  x=d+j=40+88=128



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