{4=С1+C2 {26=2·С1+8·C2
{4=С1+C2. /·2 → {8=2C1+2C2 {26=2·С1+8·C2 ⇒ {26=2C1+8C2 26–8=6C2 C2=3 C1=4–C2=4–3=1