Ask 6 questions about Libby.Use has to or doen't have to.For example: Libby has to get to school before 9.am

2 2/9 - 2/3 . x = 1/2

x/2 - 2/5 = -1/10

a) (-79) - (-47) + 52 - (-4) . (-5)
b) 67 - (79 - 60) - 48 + ( -15)
c) (-2) ^3 . (-56 + 70) - (-17) . ( - 9 + 12)
d) 37 - (- 48) - 72 - (-6) . (-5)

a) 3x + 2 . (-7) = 10
b) 25 -(30 + x) = - (27 - 8)
c) 15 - x = 12 - ( -14)
d) (4x + 11) - ( x + 34) = 67
e) 3 - 17 - x = 289 - (36 + 289)

ai solo phi phai ko
chốt 7-0:))))))))))))))