1. Daca a+2b=5 si c=3, atunci valoarea expresiei a+2(b+c) este..

Răspuns :

a+2(b+c) = a+2b+2c
=5+3•2=
=5+6=
=11

Bafta :3

a+2b=5, c=3,

a+2(b+c)=a+2b+2c=5+3*2=5+6=11