6. A lending library has a fixed charge for the first
three days and an additional charge for each day
thereafter. Shristi paid 27 for a book kept for
seven days, while Rekha paid 21 for the book she
kept for five days. Find the fixed charge and the
additional charge paid by them.
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Answer:
If fixed charge =x
Additional charge=y
3x+4y=27. -----------(1)
3x+2y=21. -------------(2)
----------------------------
2y=6
Y=3
The value of Y fixed in (1)
3x+4y=27
3x+4×3=27
3x=27-12
3x=15
X=5
Step-by-step explanation:
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