Răspunsuri

2014-11-06T18:34:20+02:00
2x+7(x+1)+5=18+3x+6
2x+7x+7+5=18+3x+6
9x+12=24+3x
9x-3x=24-12
6x=12
x=12:6
x=2
2014-11-06T18:45:48+02:00