Question

(đăng cho các CTV thử việc ^-^)

Tìm x: 

a, -5/6 - x = 7/12 + -1/3

b, (4,5 - 2x).(-1 4/7) = 11/14

c, (2/11 + 1/3).x = (1/7 - 1/8).56

Answer 1

`a)-5/6-x=7/12+[-1]/3`

   `-5/6-x=1/4`

   `x=-5/6-1/4`

   `x=-13/12`

`b)(4,5-2x).(-1 4/7)=11/14`

   `(4,5-2x).(-11/7)=11/14`

    `4,5-2x=11/14:(-11/7)=-0,5`

    `2x=4,5-(-0,5)=5`

    `x=5:2=2,5`

`c)(2/11+1/3)x=(1/7-1/8).56`

   `17/33 x=1/56 .56=1`

      `x=33/17`