Lakshmi bought bread for rupees (7x+9) but for rupees (3x-5) .she gave a ruppes 100 notes. how much will she get back
Answers
Answer:
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Answer:
Lakshmi bought bread and butter for Rs. 10x + 4 (7x + 9 + 3x -5). She provides Rs. 100 and gets back some change.
So the money spent is Rs. 10x + 4, here x can vary from 1…9 (so that the value is less than 10).
When x = 1, then 3x - 5 will be negative, as butter price cannot be negative, x varies from 2 to 9.
Again x can take floating numbers as well..
As of now, lets us restrict our analysis to integers then x = {2, 3, 4, 5, 6, 7, 8, 9}
When x = 2, Rs. 24 (10x + 4) is spent so she receives Rs. 76
x = 3, Rs. 34 is spent so she receives Rs. 66
similarly
x = 4, Rs. 44 is spent and she receives Rs. 56 back till x = 9