Răspuns:
5. [tex]\left \{ {{m+p=120} \atop {m-13=p+17}} \right.[/tex] ⇒ m=p+30
p+30+p=120 2p=90 p=45 m=75
6. i+v+c=71
v-4=9·(i-4) ⇒ v=9i-36+4 v=9i-32
c+6=3·(i+6) ⇒ c=3i+18-6 c=3i+12
i+9i-32+3i+12=71
13i=71+20 13i=91 i=7
v=9·7-32 v=31
c=3·7+12 c=33
7+31+33=71
Explicație pas cu pas:
