Question

Which system has (-2, -2) as the solution?
A) x + y = -1
4x + 4y = -4
B) 4x + 6y = -12
2x + 3y = 9
C) x + y = -4
-3x + 2y = 2
D) x - 4y = -8
2x - 3y = -16
E) x - y = -2
3x - y = 0

Answer 1

plug x = -2 and y = -2 into each of the options and see which ones fit

Answer 2

I already tried. I couldn't figure it out! I am not good at these king of problems.

Answer 3

kind*

Answer 4

eg
Option A
first equation
-2 + -2 = -4 NOT -1

so its not A

Answer 5

okay.

Answer 6

try Option C

Answer 7

-3(-2)+2(-2)

Answer 8

hang on. i wanna try it

Answer 9

- 2 - 2 = -4 that fits
now try second equation

-3(-2) + 2(-2) = ?

Answer 10

it would be possitive 2 tho

Answer 11

yes

Answer 12

so C would be the answer? i thought the answers had to be -2

Answer 13

oh nevermind i see now. thank you

Answer 14

you just helped me alot!! thank you very much!

Answer 15

No the roots are (-2,-2)
(-2,-2) fits the second equation which has 2 on right hand side

Answer 16

yea man i see it now.

Answer 17

yw