Răspunsuri

2014-11-05T18:37:40+02:00
2014-11-05T18:45:48+02:00
A)4x+7=x-3 
4x-x=-3-7
3x=-10 | :3
x=-3.(3)
B)3(2x+1)=5x-2
6x+3=5x-2
6x-5x=-2-3
x=-5