Упростите выражения: -8(k-3) + 4 (k-2) - 2 (3k+1)
5\9 (3,6a- 3 3\5b)- 3,5 (4\7a- 0,2b)
Решите уровнение
0,6 (-y-3)-0,5(y-1)= 1,5
(2,5y-4) (6y+1,8)= 0
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