а) 6xz · 2yz = 12xyz²
б) 8a + (3 - a) - (4a + 5) = 8a + 3 - a - 4a - 5 = 3a - 2
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а) 6xz · 2yz = 12xyz²
б) 8a + (3 - a) - (4a + 5) = 8a + 3 - a - 4a - 5 = 3a - 2