What is the solution to the system of equations? use the substitution method to solve. 6=−4x+y−5x−y=21

The correct answer would be -3, -6, this is because when you add 4 to the consistent, then divide by the inconsistent variable, you get  -3, this will be your Y axis. To get the X axis you simply need to divide the Y axis by four, then multiply it by two to get -3. This will put your answer as -3,-6 I hope this helps, pleas mark brainiest.

I’m not sure how this works