1. Вычислите значение алгебраического выражения: а) 4 (5-3а) + 5 (3а-4) при а= 2,5;
б) 6,4 (a + a*)-3,2 (a + 2а) при а=-0,1;
в) (4-2х)-(3-5x) + (4 – 3х) при х = 0,2345.​
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