Question

Va rog este urgent!!!! Daca a+b=12 si b+c=9, calculati 2a+6b+4

Answer 1

Răspuns:

a+b=12 I·2=>2a+2b=24

b+c=9 I·4 =>4b+4c=36

2a+2b+4b+4c=60

2a+6b+4c=60

Answer 2

a+b=12

b+c=9

2a+6b+4=?

____________________________

12-9=3(b)

12-3=9(a)

9-3=6(c)

6(2a)+18(6b)+28(4c)=24+28=52

scuze ca nu am raspuns mai repede, dar mi sa sters raspunsul