Answer:
y=2
x=-1
Step-by-step explanation:
2x-y = -4 (1)
x+3y=5 (2)
x-4y=-9 (move the 4 to rhs)
x=4y-9
sub the x equation into (2)
4y-9+3y=5
7y=14
sub y into equation (1)
2x-2=-4
2x=-2
x + 3y = 5 => x = 5 - 3y
2x - y = -4
Subs x
2.(5 - 3y) - y = -4
10 - 6y - y = -4
10 - 7y = - 4
10 + 4 = 7y
y = 14/7
y = 2
Subs y
2x - 2 = -4
2x = -4 + 2
2x = -2
x = -2/2
x = -1
