Question

Se stie ca :a x b + a x c=42 si b + c =7. Afla valoarea lui a.

Answer 1

a*b+a * c= a *(b+c)
a *(b+c) =42
a* 7=42
a=42:7=6

Answer 2

a*b+a*c=42
b+c=7
a*(b+c)=42
a*7=42
a=42:7
a=6