Question

2x-y=-3 -x+y=-20 me ajudem!!!!!!!!!!!!;!!!

Answer 1

2x-y= -3
-x+y= -20

corta o -y e o +y.

2x-x= -3-20
x= -23.

2x-y= -3
2×(-23)-y= -3
-46-y= -3
-y= -3+46
-y= 43 . (-1)
y= -43.

S= [(-23,-43)].