Solve the following system of equations:

−2x + y = 1
−4x + y = −1

(3, 1)

(−1, 3)

(−1, −3)

(1, 3)

Question

Solve the following system of equations: 

−2x + y = 1
−4x + y = −1 

 (3, 1) 

 (−1, 3) 

 (−1, −3) 

 (1, 3)

ajprincess · Answer

when u subtract the 2nd eqn from 1st u get
2x=2
x=1
Applyin t in the 1st eqn
-2+y=1
y=3
(1,3)

anonymous · Answer

Rearrange -2x + y = 1
                          y = 2x + 1
sub y = 2x + 1 into second equation
-4x + 2x + 1 = -1
-2x = -2
    x = 1
Sub x = 1 back into either equation one or two
lets sub it back into equation one.
-2(1) + y = 1
-2 + y = 1
so y = 3

Now u have ur x = 1 and y = 3 so it is (1,3)