Question

Solve the following system of equations:

−2x + y = 1
−4x + y = −1

(3, 1)
(−1, 3)
(−1, −3)
(1, 3)

Answer 1

Go ahead and solve it. What's your plan?

Answer 2

how do i solve it

Answer 3

Have you considered he methods in your book or that you discussed in class?

Personally, I'm tempted to multiply the Top Equation by -1.

Answer 4

should i try and isolate the Y

Answer 5

If you want. If not otherwise specified, you should feel free to use any desired method with which you are familiar.

Answer 6

Y=3
X=1

Answer 7

is that correct

Answer 8

Try it out and see.

−2x + y = 1

−2(1) + (3) = 1
-2 + 3 = 1 -- Okay, that's the first one.

−4x + y = −1

−4(1) + (3) = −1
-4 + 3 = -1 -- Okay, that's the second one.

How did you arrive at that solution? Show your work!

Answer 9

i used my scientific calculator

Answer 10

The old graphical method trick? That works, but you might learn less. Not necessarily.