Решение:
3х - (5х - (3х-1)) = 3х - (5х - 3х +1 ) = 3х - 5х + 3х - 1 = х - 1
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Решение:
3х - (5х - (3х-1)) = 3х - (5х - 3х +1 ) = 3х - 5х + 3х - 1 = х - 1