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Question

Another question need help. Thanks!

 

Ben had 5 tins of marbles. At first , each of the tins contained the same number of marbles. He took 18 marbles from each tin. After that, the total number of marbles left in the 5 tins was equal to the total number of marbles in 2 of the tins at first. What was the number of marbles in each tin at first?

Answer

5 x 1 units = 5 units (number of marbles in all 5 tins at first)
(1 unit – 18) x 5 = 5 units – 90 = 2 units
1 unit = 90/(5 – 2) = 30

Ans : 30 marbles.

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