Answer:
I think it's 72
Step-by-step explanation:
I hade add them
hope this will help you.
does it have a picture
hello :
the system is : x+ y =4 ...(*)
2x - y = -1...(**)
add(*) and (**) : 3x=3 so : x=1
put this value into (*) : 1+y=4 so : y=3
one solution : (1 , 3)
