Question

PLS HELP IT IS DUE TOMORROW!!! PLSSS

Answer 1

System A to System B

Option 3 and the answer in the box is
`\boxed{-2}`

System B to System C

Option 4 and the answer in the box is
`\boxed{-2}`

Explanation:

Only showing work for correct options:

System A to System B

Correct choice: Option 3 with -2 as multiplier

`\bold{-2}` x Equation [A1] :

`\implies -2(-7x + 2y = 13)\\\\\implies 14x - 4y = -26\\`

`\bold{-2}` x Equation [A1] + Equation [A2]

`14x - 4y = -26 + (-8x +5y = 4)\\\\14x -8x -4y +5y = -26 + 4\\\\6x + y = -22\\\\\textrm{This is equation B2}`

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

System B to System A

Correct choice: Option 4 with
`\boxed{-2}` as multiplier

`\bold{-2}` x Equation [B2]:

`\implies -2(6x + y = -22)\\\\\implies -12x -2y = 44\\\\`

`\bold{-2}` x Equation [B2] + Equation [B1]:

`-12x -2y = 44 + (-7x + 2y = 13)\\\\\implies -12x -7x -2y + 2y = 44 + 13\\\\-19x = 57\\\\`