Đáp án :
h, 3/4 . x + 1/3 = 1/6 i, 1/3 +1/2 : x = -4
3/4 . x = 1/6 - 1/3 1/2 : x = -4 - 1/3
3/4 . x = 1/6 - 2/6 = -1/6 1/2 : x = -12/3 - 1/3 = -13/3
x = -1/6 : 3/4 x = -13/3 . 1/2
x = -1/6 . 4/3 x = -13/6
x = -2/9 Vậy x = -13/6
Vậy x = -2/9
k, x - 1/5 = 2/7 . -11/5 l , ( 2x - 3 ) + 1/5 = 4/7
x - 1/5 = -22/35 2x - 3 = 4/7 - 1/5
x = -22/35 + 1/5 2x - 3 = 20/35 - 7/35 = 13/35
x = -22/35 + 7/35 = -15/35 = -3/7 2x = 13/35 + 3
Vậy x = -3/7 2x = 13/35 + 105/35= 118/35
x = 118/35 : 2
x = 118/70 = 59/35
Vậy x = 59/35
