3/13 - 9/13 : x = 5
9/13 : x = 3/13 - 5
9/13 : x = -62/13
x = 9/13 : ( -62/13 )
x = -9/62
3/13-9/13:x=5
3/13:x=3/13-5
3/13:x=(-62/13)
x=3/13:(-62/13)
x=(-3/62)
vây x=(-3/62)
3/13-9/13:x=5
9/13:x=3/13-5
9/13:x=(-62/13)
x=9/13:(-62/13)
x=(-3/62)
Vậy x=(-3/62)
3/13 - 9/13 : x = 5
9/13 : x = 3/13 - 5
9/13 : x = -62/13
x = 9/13 : ( -62/13 )
x = -9/62