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leah put 21 white marbles 31 black marbles and 7 blue marbles in a bag then her sister added 19 yellow marbles write a number sentence to show the number of marbles in the log

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leejongsuk

21+31+7+19=n

21+31+7+19=78

AvayaPapaya

So the answer is sorta simple here:

Since Leah Put 21 white marbles, 31 black, and 7 blue if her sister added 19 add 21+31+7+19 and itll get you 78 marbles all together 

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