Question

9x-4y=-3
8x-3y=-1

Answer 1

72x-32y=24
-72x+27y=9
-5y=-15
y=3

8x-3y=-1

8x-3(3)=-1

8x - 9=-1

8x =8

Answer 2

I just need to know if it is correct

Answer 3

9 x - 4 y = - 3 Multiply both sides by 8

72 x - 32 y = - 24


8 x - 3 y = - 1 Multiply both sides by 9

72 x - 27 y = - 9


72 x - 32 y = - 24
-

72 x - 27 y = - 9
___________________

- 32 y - ( - 27 y ) = - 24 - ( - 9 )

- 32 y + 27 y = - 24 + 9

- 5 y = - 15 Divide both sides by - 5

y = 3


9 x - 4 y = - 3

9 x - 4 * 3 = - 3

9 x - 12 = - 3

9 x = - 3 + 12

9 x = 9 Divide both sides by 9

x = 1

Answer 4

are you doing elimination

Answer 5

so, you got x=1
Use that in the other equations and see whether you get the same value of y for each.

If so, then that x and y are the solution.