Réponses

2013-03-10T16:11:43+01:00

x+(-73.5=(-18.6)

x=-18.6+73.5

x=54.9

 

x-(-8.3)=-41

x+8.3=-41

x=-41-8.3

x=-49.3

 

5(3x+1)+2(x+3)=-6

5*3x+5*1+2*x+2*3=-6

15x+5+2x+6=-6

15x+2x=-6-5-6

17x=-17

x=-17/17

x=-1