Question

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Answer 1

Welcome to OpenStudy! What do we need to do with these equations?

Answer 2

Solve, ok, so do you want to solve by elimination or substitution?

Answer 3

Ok :) so we need to multiply one or both equations so that either x or y cancels. I'm thinking it will be easiest to multiply the second equation by -2 to make y cancel

Answer 4

Could you do that? :)

Answer 5

That's ok :) I'm here to help
First, we have -2x*-2, a negative times a negative is a postive

Answer 6

Yep

Answer 7

Now y*-2, a negative times a positive is a negative

Answer 8

close, -2y

Answer 9

now 8*-2

Answer 10

Yep, so no we have 4x - 2y = -16, now we add the system of equations vertically

Answer 11

Yep, now add the x's together, the y's cancel, and add the constants

Answer 12

Yep, now how do we get just x on the left side?

Answer 13

yes! divide both sides by 7, and -14/7 is?

Answer 14

yes! so now we have x :D we can just substitute that into one of the equations, and we end up with y

Answer 15

that's ok :) since we have that x is -2, we can plug that into -2x + y = 8

-2x + y = 8
-2(-2) + y = 8
4 + y = 8

Answer 16

Nope, 4 and y are not like terms, so we can't combine them. Instead, we need to get rid of the 4

Answer 17

almost! what is the opposite of adding?

Answer 18

Yes! So we need to subtract 4 from both sides

Answer 19

and that will give us y

Answer 20

Yep, so our final coordinate, or the solution, is (-2, 4)

Answer 21

No problem! And I must say thank you for participating and asking for help when you weren't sure on how to do something

Answer 22

If you have any questions about the site, feel free to message me and let me know :)