РЕШИТЕ УРАВНЕНИЯ - A)3X - X + 5X = 2.1 Б)X + 1.2X - 3.6X = -7 В)3Y -11 = 1 - 2Y Г)2(Y + 2) = -3(Y-1) Д)4(X-5) - (7X + 9) = 1 Е)2X - 3(4-X) = 5-(X-1) Ж)1/3X + 2 ( 2/3X - 1/6 ) = -1 1/6 З)0.4(3X - 0.5) = 1.5X + 0.2 ( X+1)