Question

Which pairs are solutions to the equation?

3xy + 9 = 33



A.


(1, 8) and (1, 11)


B.


(1, 11) and (2, 6)


C.


(1, 8) and (8, 1)


D.


(8, 1) and (2, 6)

Answer 1

How it is possible to get value of two unknown by single equation???

Answer 2

@theoryofmars Are u getting my point??

Answer 3

I think it is C.

(1,8)
3xy + 9 = 33
3(1)(8) + 9 = 33
24 + 9 = 33
33 = 33 (correct)

(8,1)
3xy + 9 = 33
3(8)(1) + 9 = 33
24 + 9 = 33
33 = 33 (correct)