64 - (16 + к) = 38
64 - 16 - к = 38
-к = 38 + 16 - 64
-к = -10
к = 10
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6 * х - 29 = 13
6*х = 13 + 29
6*х = 42
х = 42/6
х = 7
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31 - р / 8 = 27
31 - 27 = р / 8
4 = р / 8
- p = 8 * (- 4)
-р = -32
р = 32