Question

calculati 2m+4n+2p, stiind caa m+n=15 si n+p=45

Answer 1

aduni cele doua ecuatii si iti da: m+2n+p=60 si inmultesti totul cu 2 m+2n+p=60/*2 => 2m+4n+2p=120

Answer 2

2m+4n+2p= 2m+2n+2n+2p= 2(m+n)+2(n+p)= 2*15+2*45= 30+90=120