CBSE Class 10 Answered
Linear equation in two variables
Asked by | 07 Aug, 2009, 06:55: PM
Expert Answer
Let x = number of flowers,
y = number of flies,
If one fly sit on each flower, one fly is left behind. In other words, the number of flies are greater than flowers by one.
Hence x + 1 = y.
x - y = -1 .......(1)
If two flies sit on each flower, (y/2 pairs of flies) one flower is left behind. In other words, y/2 pairs of flies are less than the flowers by exactly one.
Hence x - 1 = y/2.
2x - y = 2 ..........(2)
Solving equations (1) and (2)
gives, x = number of flowers = 3 and y = number of flies = 4.
Regards,
Team,
TopperLearning.
Answered by | 07 Aug, 2009, 09:09: PM
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