Ответы на вопрос:
1/6 : (1/4х - 1/3) - 3/8 = 1/40 1/((6(1,4х - 1,3)) - 3/8 = 1/40 общ.знамен.= 120(1,4х - 1/3) 20 - 45(1,4х - 1,3) = 3(1,4х - 1/3) 20 - 63х + 58,5 = 4,2х - 1 - 63х - 4,2х = - 20 - 58,2 - 1 67,2х = 79,2 х = 1целая 5/28
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