2y = 2x - 4 এবং 4x - 5y = 3 হলে x ও y-এর মান কত ?

A x = 5, y = 9

B x = 2, y = 5

C x = 3, y = 7

D x = 7, y = 5

Solution

Correct Answer: Option D

2y = 2x - 4
⇒ y = x - 2 ..........(1)

4x - 5y = 3
⇒ 4x - 5(x - 2) = 3
⇒ 4x - 5x + 10 = 3
⇒ - x = - 7
∴ x = 7

x এর মান (1) নং এ বসিয়ে পাই,
y = 7 - 2 = 5

∴ নির্ণেয় মান (x, y) = (7, 5)

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