Răspunsuri

2014-10-07T22:16:05+03:00
A+5*b+5*c=a+5(b+c)=18+5*57=18+285=303

3*a+2*b+2*c=3*18+2(57)=54+114=168

a*b+a*c+7*b+7*c=18*57+7*57=57*25=1425