Bonsoir
3 x /2 + x /4 = 6 x /4 + x /4 = 7 x / 4
5 x /6 + ( x - 4 ) / 3 = 5 x /6 + ( 2 x - 8 ) / 6 = ( 5 x + 2 x - 8 ) /6 = ( 7 x - 8 ) /6
3 - ( x - 1 ) / 5 = 15 /5 - ( x - 1 ) /5 = ( 15 - x + 1 ) / 5 = ( - x + 16 ) / 5
- 5 x - ( 3 x - 2 ) / 4 + 3 = - 20 / 4 - ( 3 x - 2 ) / 4 + 12 /4
= ( - 20 - 3 x + 2 ) /4 + 12 /4
= ( - 3 x - 18 + 12 ) / 4
= ( - 3 x - 6 ) / 4
