Answer: x=-42 and y=-73
Step-by-step explanation:
Given the system of equations:
.........[1]
.......[2]
Multiplying [1] by 4 we have
........[3]
........[4]
Subtracting [4] from [3]
⇒ y=-73
Putting it in [1]
Adding 73 both sides
-x=42
Multiplying both sides by -1
x=-42