Réponses

2014-02-09T17:11:46+01:00
4-5a=2a-1
-5a -2a=-1-4
-3a=-3
a=1

T-4 =-3t-10
t+3t=-10+4
4t=14
t=14/4 
t=7/2

2(x+1)=3(x-1)
2x+2=3x-3
2x-3x=-3-2
-x=1
x=-1