Pallavi spend Rs.x daily and saves Rs.y per day. What is her income after 3 weeks?
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Explanation:
Pallavi spends Rs. x daily
after 3 weeks Pallavi spends Rs. 21 × x = Rs. 21x
Pallavi saves Rs. y daily
after 3 weeks Pallavi saves Rs. 21 × y = Rs. 21y
After 3 weeks Pallavi's income is 21y - 21x = xy. Ans.
Hope it helps you.
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