Réponses

2014-03-01T11:25:57+01:00
A = -27 -7 * (-5) - 2 *4
A = -27 +35 - 8
A = 0
B= 3(2x+5)-4(2-5x)
B = 6x + 15 - 8 + 20x
B = 26x + 7
C= 5/7 - 14/25 * 15/49
C= 5/7 - 14/25 * 15/49
C= 5/7 - 210/1225
C = 5/7 - 6/35
C = 25/35 - 6/35
C = 19/35
D= 2/3 * 5/4 - 5/3  /  30/7
D = 10/12 - 35/90
D = 75/90 - 35/90
D = 4/9
E = 1/4  + 3/4  /  1+1/8
E = 1/4 +3/4+1/8
E = 2/8 + 6/8 + 1/8
E = 9/8
merci bcp ca m'aide vraiment car je comprends pa grand chose a ça !!