Question

Solve the following system of equations: 2x+y=1 -4+y=-1

Answer 1

2x+y=1
-2x -2x
————
[y=-2x+1]
-4+1(-2x+1)=-1
4-2x+1=-1
-1 -1
———————
3-2x=-1
-3 -3
———————
-2x=-4
—— —
-2 -2
[X=2]

2(2)+y=1
4+y=1
-4 -4
————
[y=-3]

x y
Answer: (2,-3)