Решите уравнения: 1) 2000/х = 40

2) y/70 = 5

3) (60 * a - 32) : 16 = 3

4) 75 - 960 : (b+39) = 55

5) 12 7/23 - (6 18/23 - t) = 3 21/23 + 5 19/23

6) (k - 5 3/14) + 8 13/14 = 15 - 3 9/14
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