Question

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

-4x + y = -1


A) (3, 1)
B) (-1, 3)
C) (-1, -3)
D) (1, 3)

Answer 1

Give me one second and I will be back to help.

Answer 2

ok thanks

Answer 3

Okay so it's better to learn it @SolomonZelman could explain it to you he is a genius. But, I usually just plug it in. So lets start with A.....
-2(3) + 1 = 1
-6 + 1 = 1
-5 = 1 (That is not right CROSS A OFF)

B
-2(-1) + 3 = 1
2 + 3 = 1
5 = 1 (That is not right CROSS B OFF)

C
-2(-1) + (-3) = 1
2 - 3 = 1
-1 = 1 (That is not right CROSS C OFF)

D
-2(1) + 3 = 1
-2 + 3 = 1
1 = 1 (Yes, move on to the next)

-4(1) + (3) = -1
-4 + 3 = -1
-1 = -1

YOUR ANSWER IS D.
Hope this help and good luck on school.

Answer 4

thanks! could you possibly help me out with a few more problems? @team_cuban

Answer 5

Sure close this question first and make it a new one though.