Răspunsuri

2014-11-02T16:12:18+02:00
Ab+ac+7a= 96 => a(b+c+7)=96 => a(5+7)=96 => 12a=96/ :12 => a= 96/12 => a=8
2014-11-02T16:13:13+02:00

a(b+c)+7a =96                    b+c=5

5a+7a=96

12a=96

a=96:12

a=8