3. Найдите корни уравнений: a) 3r = 28 -r: B) 5х + 12 = 8r + 30; д) 33 + 8x=-5x + 72; 6) 6x-19 = -x-10; г) 7 - 2х = 3x - 18; e) 2x + 9 = 2х-4. помогите ​
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