If m1 and m2 are the slopes of each line, for them to be perpendicular you gotta solve
m1 * m2 = -1
Half if you were a good friend
Answer:

Step-by-step explanation:
To solve, first subtract 2x from both sides.

You appear to want the solution for -y, so I've included it. Given that you also want the solution for y, divide both sides by -1.

Answer:
Triangle CED
Step-by-step explanation:
C and M need to both be at the same places in their respective equations.