3x-7y+10=0 এবং y-2x-3=0 এর সমাধান-

A x=1,y=-1

B x=1,y=1

C x=-1,y=-1

D x=-1,y=1

Correct Answer: Option D

3x - 7y + 10 = 0 ........(1)

y - 2x - 3 = 0

=> y = 2x + 3 .......(2)

(1) নং হতে, 3x - 7 (2x + 3) + 10 = 0

=> 3x - 14x - 21 + 10 = 0

=> -11x = 11 x = -1

(2) নং হতে, y = 2(-1) + 3 = 1

x = -1, y = 1