Question

3-3d
___=4
6
корень уравнения

Answer 1

( 3 - 3d ) / 6 = 4
3 - 3d = 4 • 6
- 3d = 24 - 3
- 3d = 21
d = 21 : ( - 3 )
d = - 7

Answer 2

      3-3d
12* ------ =4  *12
        6

2*(3-3d)=48
6+6d=48
6d=42
d=7