Question

Daca ab +ac+a=749 si b+c=106, aflati a

Answer 1

3a(b+c) = 749

3a x 106 =749
3a = 749 : 106 
3a = 7
a= 7 pe 3 

Sper ca e bine.

Answer 2

$ab+ac+a=749 \\ b+c=106 \\ a=? \\ ab+ac+a=749 \\ a(b+c)+a=749 \\ 106a+a=749 \\ 107a=749 \\ a=749:107 \\ \boxed{a=7}$