398. Решите уравнение: 1) (2x – 3) (4х + 3) — 8² = 33;
2) (2x – 6) (8х + 5) + (3 – 4x) (3 + 4x) = 55;
3) 21x? - (3х - 7) (7x – 3) = 37;
4) (х+1)(х + 2) (х – 3)(х + 4) = 12;
5) (-4х + 1)(х - 1) – х = (5 – 2x) (2x + 3) – 17.​

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