Question

Bài 1 Tìm x 

^{1/3+1/2 : x=-43x-30%x=-5,4x-43=(57-x)-50}​3/8-1/6x=1/42/3+1/3:x=3/5X+30%x=-1,3

Bài 2 Thực hiện phép tính

3/5-(-7/10)-13/202/5+3/5:(3/5+-2/3)-7/2

Answer 1

Giúp với

Answer 2

1. 1/3 + 1/2 : x = -4

   => 1/2 : x = -4 - 1/3

        1/2 : x = -13/3

      => x = 1/2 : (-13/3)

          x = -3/26

2. 3x - 30%.x = -5,4

     3x - x = -18

      2x = -18

=> x = -18 : 2

     x = -9

Answer 3

3. x-43 = (57 - x) - 50

  => (57 - x) . (x - 43) = -50

=> 57 - x = -50 => x = 107

=> x - 43 = -50 => x = -50 + 43 = -7

4. 3/8 - 1/6x = 1/4

 => 1/6x = 3/8 - 1/4 = 1/8

=> x = 1/8 : 1/6 = 3/4

5. 2/3 + 1/3 : x = 3/5

=> 1/3 : x = 3/5 - 2/3 = -1/15

=> x = 1/3 : (-1/15) = -5

6. x + 30%x = -1/3

 bó tay hihi!!!!