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: x=-1, y= 1
3x - 7y + 10 = 0 ...... (i) y - 2x - 3 = 0⇒y = 2x + 3.... (2) (1) হতে, 3x - 7 (2x + 3) + 10 = 0 ⇒3x - 14x - 21 + 10 = 0⇒ - 11x = 11.'.x = - 1 , y = 1