👤

Daca a+b=7, iar b+c=10, aflati a+3b+2c.

Răspuns :

a+3b+ 2c = a +b + 2b +2c= a+b +2(b+c)=
7 +2· 10 = 27
a + b = 7
b + c = 10

a + 3b + 2 c = a + b+ 2b + 2c =a + b + 2 ( b + c)=7 + 2 x 10 = 7 + 20 = 27