Question

what is the solution of the system?
4x-y= -3
6x-y= -8
(5,5.5)
(-2.5, -7)
(-2.5, 2.2)
(20, -28)

what is the solution of the system
5x+6y=20
9x+11y=32
(28, -20)
(28, 20)
(-28, 20)
(20, -28)

Answer 1

4x-y= -3
6x-y= -8
subtract the top from the bottom and you get
2x = -5
x = -5/2
y = 4x+3 = -10+3 = -7
So, (-2.5,-7)

You can do the other in a similar way, or use substitution.
Once you have your answer, check to make sure it works in both equations.