If a certain vase contains only roses and tulips, how many tulips are there in the vase?
i. The number of roses in the vases is 4 times the number of tulips in the vase.
ii. There is total of 20 flowers in the vase.

Question: If a certain vase contains only roses and tulips, how many tulips are there in the vase?
i. The number of roses in the vases is 4 times the number of tulips in the vase.
ii. There is total of 20 flowers in the vase.

Solution:
ধরি,
টিউলিপ = T
গোলাপ = R
ATQ,
(i): R = 4T

(ii): R + T = 20

(i) থেকে, R = 4T (ii) তে বসাই:
4T + T = 20
5T = 20
∴ T = 4
∴ টিউলিপের সংখ্যা 4 টি।