Answer:
Step-by-step explanation:
Substitute (x, y) value in 5x - 4y and if you get 17 then (x , y) is the solution.
If you are getting 17, then (x, y) is not a solution.
1) (1 , -3)
5x - 4y = 5*1 - 4*(-3)
= 5 + 12
= 17
(1, - 3) is a solution.
2) (-6, 2)
5x - 4y = 5*(-6) - 4*2
= -30 - 8
= -38 ≠ 17
So, (-6 , 2) is not a solution.
3) (-3 , -8)
5x - 4y = 5*(-3) - 4* (-8)
= -15 + 32
= 17
So, (-3 , -8) is a solution.
4) (2 , 9)
5x - 4y = 5*2 - 4 *9
= 10 - 36
= -16 ≠ 17
So, (2 , 9) is not a solution
