82 балла:
Найдите множество корней уравнения:

а) 2,4x - 1,5 = 0,2 - 0,6(3-4z)

б)1,4y - 0,4(5y - 3) = -0,6(y - 2)

в) 9,2а +36,9 = 4,8(12,6 - а) + 10,72

г) -7,14 +2,7b = 20,5 - 3,5(14.8 - b)
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