Answer:
Solution:
 -x - 6y = -23
Now, let's substitute the value of y into the first equation.
- x + 4y = 17
 - => x + 4(3) = 17
 - => x + 12 = 17
 - => x = 5
 
Let's check our answer to make sure it is correct.
Check:
- -x - 6y = -23
 - => -(5) - 6(3) = -23
 - => -5 - 18 = -23
 - => -23 = -23
 
Hence, this is proven correct.
Hoped this helped.