Réponses

2014-02-11T20:14:23+01:00
N° 52
A = 2x+4-8x+9
-6x +13
B = 3a -7 +2a +5 +3a -10
8a -12
C = 3t +0,1 - 4,5 +6t +12 -3,2 -t
8t +4,4 
2014-02-11T20:53:14+01:00
A= 2x+4-(8x-9)
A= 2x+4 + 8x +9
A = 10x + 13

B = 3a-7+(2a+5)+(3a-10)
B = 3a-7-2a-5-3a+10
B= -2a-2

C= 3t+0.1-(4.5-6t)+[12-(3.2+t)]
C= 3t+0.1+4.5+6t+(12+3.2-t)
C = 3t+0.1+4.5+6t-12-3.2+t
C = 10t-10.6