Bonsoir,
3/4 + 3x -1/4
= 3x +2/4
= 3x +1/2
3x/4 - 15/4 +1/2
= 3x/4 -15/4 + 2/4
= 3x/4 -13/4
2x/3 +5x -5/6
= 2x/3 + 15x/3 -5/6
= 17x/3 -5/6
2 +3x/5 -3/3
= 2 +3x/5 -1
= 1 +3x/5
