Which ordered pair is the solution to the system of equations?

A.
(2, −1)

B.
(1, −9)

C.
(−2, −2)

D.
(−6, −3)

Question

Which ordered pair is the solution to the system of equations?
 
 
 
 A.
(2, −1)
 
 B.
(1, −9)
 
 C.
(−2, −2)
 
 D.
(−6, −3)

logan13 · Answer

https://static.k12.com/bank_packages/files/media/mathml_f91a45c650e7eeda665db5e0d1ca89b938dc3795_1.gif

welshfella · Answer

to solve this multiply the second equation by 4 and add this new equation to the first one.
this will eliminate y so you can find  x
Then find x by plugging in the value oy y into equation 1.

logan13 · Answer

so 1 -9

welshfella · Answer

*Then find y by plugging in the value of x into equation 1.

welshfella · Answer

No

logan13 · Answer

@welshfella  a

welshfella · Answer

lets do the thing

x   - 4y = 6
3x + y = -8  * this by 4

12x + 4y = -32
x      - 4y  =  6      ADD:-

13x           = -26

now divide both sides by 13 to get the value of x

I think you can finish this off.

logan13 · Answer

@welshfella  so D

welshfella · Answer

you've only got to work out x from 13x = -26 and you'll see which option it is straight away.