Question

write a pair of linear equations which has unique solution x =1 and y=-1

Answer 1

1st equation => 4x = -4y
2nd equation => -2x-1=3y

Answer 2

Answer:

x+y = 0

x-y = -2

Step-by-step explanation:

Given,

x = 1, y = -1

Now, add x and y.

(i.e) 1+(-1)

    =0

Therefore, the first equation is x+y = 0 and a1 = 1, b1 = 1

Now, Subtract y from x.

(i.e) 1 - (-1)

     =2

Therefore, the second equation is x-y = 2 and a2 = 1, b2 = -1

W.K.T for an unique solution a1/a2 ≠ b1/b2 here,

                                                                                1/1 ≠ 1/-1

                                                                                (i.e) 1 ≠ -1

                                                                                 Hence Verified