Problema Solution
The number of marbles in Box A, Box B and Box C was 468.
John then added 60 marbles to those in Box A, doubled the number of marbles in Box B and halved the number of marbles in Box C.
The ratio of the number of marbles in Box A to the number of marbles in Box B to the number of marbles in Box C is 8:2:1.
What is the total number of marbles in Box A at first?
Answer provided by our tutors
Let
8t = the number of marbles in Box A after adding 60 marbles
8t - 60 = the original number of marbles in Box A
2t = the number of marbles in Box B after doubling the number
(2t)/2 = t the original number of marbles in Box B
t = the number of marbles in Box C after halving it
2t = the original number of marbles in Box C
8t - 60 + t + 2t = 468
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click here to see the equation solved for t
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t = 48 marbles
The total number of marbles in Box A at first was: 8*48 - 60 = 324 marbles.