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Wasn’t there for class so I don’t really know how to do this someone help :(

Wasn’t there for class so I don’t really know how to do this someone help :(-example-1

1 Answer

1 vote

Answer:

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

User Rob Van Der Leek
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