Question

3b+3c+ab+ac=30 unde a=2 sa aflam b+c​

Answer 1

Explicație pas cu pas:

3b+3c+ab+ac=30 =>

3(b+c)+a(b+c)=30 =>

(b+c)(3+a)=30 =>

5(b+c)=30 => b+c=6

Answer 2

Răspuns:

Explicație pas cu pas:

3 × b + 3 × c + a × b + a × c = 30

3 × ( b + c ) + a × ( b + c ) = 30

( b + c ) ( 3 + a ) = 30

( b + c ) × ( 3 + 2 ) = 30

( b + c ) × 5 = 30

b + c = 30 : 5

b + c = 6

=