Answer:

Step-by-step explanation:
Answer: I think its BC and DC I dont know But I hope this helps!
Step-by-step explanation:
Answer:
x = -7, y = -9
Step-by-step explanation:
The coefficient (the number before) the y is the same but the signs are opposite so add the equations together:
x-3x+y-y=-16+30
-2x=14
x=-7
y=-16-x=-16--7=-9
4 and 12 are the factors 48 is the product