Question

2x+3y=9 -4x-6y=2 unique solution

Answer 1

No. They do not have unique solution.

Explanation:

2x+3y=9 (1)

-4x-6y=2 (2)

(1)*2, and (2)*1 , you have:

4x+6y=18 (1)

-4x-6y=2 (2)

(1)+(2), you have:0=20 (wrong)

The equations do not have unique solution