{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 [b]C2=3 C1=4-C2=4-3=1[/b]