Chị làm luôn nhé, ko ghi đề bài
a) x - 17/36 = -45/48 -8/48
x - 17/36 = -/48
 x = -53/48 + 17/36
x = -159/144 + 68/144 
x = 91/144
b) (x - 1/2) = -5/6 x -3/4
x - 1/2 = 45/
x = 45/4 + 1/2 
x = 45/4 + 2/4
x = 47/4 
đ) (2x + 2/3) = -15/4 : 3/1
2x + 2/3 = -15/4 x 1/3
2x + 2/3 = -5/4 
2x = -5/4 - 5/ 
2x = -15/12 - 20/12
2x = -35/12
x = -35/12 : 2/1
x = -35/12 x 1/2
x = -35/24
    bài 2:
a) -5/8 x 16/25 - 21/35
= -2/5 - 21/35
= -2/5 - 3/5
= -5/5
= -1
b) -5/12 + 4/9 - -11/6
= -15/36 + 16/36 - -66/36
= 1/36 - -66/36
= 67/36