pouvais vous m'aider décomposser et calculer :

1)12+x=5-13x ; 7x-8=3x+2

2)x/5+11=-9 ;5-x/2=1/2

3)3x/2+x/3-1=1/3 ; 3/2 x +1 =x/4-1

4(x-2)+2(1-3x)=7x+12

5)5-12x+13.5=-x+12+3x-7.5

6)11/5x+2=0 ; 11=5+3/2x

7)3x+7(8-x)+4=60+x

h4(x-1)-3(2-x)=2

1

Réponses

2012-11-29T17:29:21+01:00

1) 12+x = 5-13x

x = 5-13x-12

x +13x = 5-12

14x = -7

x = -7/14

x = -1/2

 

7x-8 = 3x+2

7x-3x = 2+8

4x = 10

x = 10/4

x= 5/2