1345. Найдите значение выражения:
1) 7. (2,3 + 0,8х) - 1,9х при х 0,4;
2) 0,9 - (6х +5) – 3,2 при х 1,2;
3) 2,5 (3х + 0,4) – 5,1х при х= 8.​
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