Решите систему
{ x + y + z = 5
2x - y + z = 2
3x - 2y + z = 1

Спасибо

{х=5–y–z{2(5–y–z)–y+z=2{3(5–y–z)–2y+z=1 {10–2y–2z–y+z=2 {15–3y–3z–2y+z=1{–3y–z=–8{–5y–2z=–14 {z=8–3y {–5y–2(8–3y)=–14–5y–16+6y=–14y=2z=8–3•2=2x=5–2–2=1Ответ: (1;2;2)