1. Решите уравнение
а) 6 - 10с = -7с - 21
б) 0,4а - 1,4 = -0,5 - 3,2
в) 0,4х + (- х - 1,8) = -2 (0,5х - 0,3)
г) (у - 3 ):4 =(5 - 2у) : -9
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