a) x(-1 - 2 - 3) + 6x = -6x + 6x = 0 - доказано
б) a(-5 + 4 - 3 + 2) = a * (-8 + 6) = -2a - доказано
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a) x(-1 - 2 - 3) + 6x = -6x + 6x = 0 - доказано
б) a(-5 + 4 - 3 + 2) = a * (-8 + 6) = -2a - доказано
-5а+4а-3а+2а=-2а