Объяснение:
(m + b)/3 - (m - 2b)/3 = (m + b - (m - 2b))/3 =
(m + b - m + 2b)/3 = 3b/3 = b
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Объяснение:
(m + b)/3 - (m - 2b)/3 = (m + b - (m - 2b))/3 =
(m + b - m + 2b)/3 = 3b/3 = b