(20 + 1 + 1) / b + 1 + 1 = 13
22 / b + 2 = 13
22 / b = 11
b = 22 / 11
b = 2 - ответ.
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(20 + 1 + 1) / b + 1 + 1 = 13
22 / b + 2 = 13
22 / b = 11
b = 22 / 11
b = 2 - ответ.