Question

Solve using elimination. 4x + y = -5 8x + 3y = -19 Plz I need help

Answer 1

Answer:

(1, -9)

Step-by-step explanation:

4x + y = -5

8x + 3y = -19

If we have to use elimination, that means we're going to add or subtract these two whole equations by each other so that we can cancel out one of the variables.

I think that we could easily turn 4x into 8x if we multiply the top equation by 2.

4x + y = -5 ---> 8x + 2y = -10

Now put them next to each other, and subtract to get rid of the xs.

  8x + 2y = -10

-  8x + 3y = -19

------------------------

  0x - y = -10 - -19

  -y = 9

   y = -9

Plug this back in to get x.

  4x + y = -5

  4x - 9 = -5

  4x = -5 - -9

  4x = 4

  x = 1