Answer:
C
[tex]x - y = - 1 \\ 4x + y = 21 \\[/tex]
Using elimination method
Add equations 1 and 2
[tex]x + 4x \\ - y + y \\ - 1 + 21[/tex]
[tex]5x = 20 \\ x = \frac{20}{5} \\ x = 4[/tex]
substitute for x in equation 1
[tex]x - y = - 1 \\ 4 - y = - 1 \\ - y = - 1 - 4 \\ \frac{ - y}{ - 1} = \frac{ - 5}{ - 1} \\ y = 5[/tex]
Therefore x is 4 and y is 5
(4,5)
If my answer is right, then please give it the brainliest.
