РЕШИ УРАВНЕНИЯ: 5 + n = 18, n + 8 = 17, n - 12 = 21, 2 + n = 20, n - 30 = 40, 12 - p = 3, 5 + p = 16, p + 5 = 17, p - 8 = 61, 14 + p = 69, 15 - s = 6, s + 61 = 64, s - 12 = 5, 10 - s = 5, s + 70 = 80, t + 32 = 42, 16 - t = 8, 10 + t = 90, t - 3 = 15, t + 6 = 18

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РЕШИ УРАВНЕНИЯ: 5 + n = 18, n + 8 = 17, n - 12 = 21, 2 + n = 20, n - 30 = 40, 12 - p = 3, 5 + p = 16, p + 5 = 17, p - 8 = 61, 14 + p = 69, 15 - s = 6, s + 61 = 64, s - 12 = 5, 10 - s = 5, s + 70 = 80, t + 32 = 42, 16 - t = 8, 10 + t = 90, t - 3 = 15, t + 6 = 18

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Решение оставшихся уравнений: 1. $14 + p = 69$ $p = 69 - 14$ $p = 55$ 2. $15 - s = 6$ $s = 15 - 6$ $s = 9$ 3. $s + 61 = 64$ $s = 64 - 61$ $s = 3$ 4. $s - 12 = 5$ $s = 5 + 12$ $s = 17$ 5. $10 - s = 5$ $s = 10 - 5$ $s = 5$ 6. $s + 70 = 80$ $s = 80 - 70$ $s = 10$ 7. $t + 32 = 42$ $t = 42 - 32$ $t = 10$ 8. $16 - t = 8$ $t = 16 - 8$ $t = 8$ 9. $10 + t = 90$ $t = 90 - 10$ $t = 80$ 10. $t - 3 = 15$ $t = 15 + 3$ $t = 18$ 11. $t + 6 = 18$ $t = 18 - 6$ $t = 12$

РЕШИ УРАВНЕНИЯ: 5 + n = 18, n + 8 = 17, n - 12 = 21, 2 + n = 20, n - 30 = 40, 12 - p = 3, 5 + p = 16, p + 5 = 17, p - 8 = 61, 14 + p = 69, 15 - s = 6, s + 61 = 64, s - 12 = 5, 10 - s = 5, s + 70 = 80, t + 32 = 42, 16 - t = 8, 10 + t = 90, t - 3 = 15, t + 6 = 18

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