Question

What is solution of the system ? Use elimination 3×-4y=-24 ×+y=-1

Answer 1

x+y=-1
For x:
x+y-y=-1-y
x=-y-1

3x-4y=-24
3(-y-1)-4y=-24
-7y-3=-24
-7y-3+3=24+3

-7y/-7 = -21/-7
Y=3

x=-y-1
x=-3-1
x=-4

x=-4, y=3