Ответ: 2x — ay + bza = 3cb = 14c^3x = 5c^3 + 2y = 6c^2 — c + 13z = 5c — 12(5c^3 + 2) — 3c*(6c^2 — c + 13) + 14c^3*(5c — 1) = = 10c^3 + 4 — 3c*6c^2 + 3c*c — 39c + 70c^4 — 14c^3 = = 10c^3 + 4 — 18c^3 + 3c^2 — 39c + 70c^4 — 14c^3 = = 70c^4  — 22c^3 + 3c^2 — 39c + 4