Question

se stie ca Ab+ac+a=165si b+c=10 aflati a

Answer 1

ab+ac+a=165;b+c=10;
*a factor comun*=>a(b+c+1)=165
a(10+1)=165
a*11=165/:11
a=15

Answer 2

a( b+ c) +a = 165 □□□□□□□□ b+c= 10 => 10 a + a= 165 => 11 a= 165 => a= 165/11 =15.