x-( - 6 ) / 15 = 4/27 ×3/4 2. x -1/4 = 6/18 ×9/2 -6/12 -x = 9/48 ×( -2 ) /3
x + 6/15 = 1/9 2x -1/4 = 3/2 -6/12 -x = -1/8
x= 1/9 - 6/15 2x = 3/2 + 1/4 x = -1/8 + 6/12
x= -13/45 2x = 7/4 x = 3/8
vậy x = -13/45 vậy x= 7/4 vậy x = 3/8
x- 4/6 = 5/25 ×( -7 )/15 x + 5/6 = 16/42 × ( -8 ) /56
x-4/6 = -7/75 x + 5/6 = -8/ 147
x = -7/75 + 4/6 x = -8/147 - 5/6
x = 43/ 75 x = - 87/ 98
vậy x = 43 / 75 vậy x = -87 / 98