svp c urg pr demain DM ^^ mrc davance -3/4 + 7/4 fois 2/3

- 3/4 + 7/4 * 2/3 
- 3/4 + 14/12 
-9/12 + 14/12 
5/12

voilà 

= -3/4 + 7/4 x 2/3
= -3/4 + 7 x 2 / 2 x 2 x 3
= -3/4 + 7/6
= -9/12 + 14/12
= 5/12