Réponses

2013-11-06T19:46:34+01:00
2x-5 = 4    
2x=4+5
x=9/2

-5x+4 = 2x-2     
-5x-2x=-2-4
-7x=-6
x=6/7

4(5x-4) = 2+3(x+7)
20x-16=2+3x+21
20x-3x=2+21+16
17x=39
x=39/17

4x/5+ 6 = 1/5x 
4/5x-1/5x=-6
3/5x=-6
3x=-6*5
3x=-30
x=-10


2/3x-1/3 =1/3
2/3x=1/3+1/3
2/3x=2/3
2x=2
x=1