3/14x-0,59=8/21x-1,24
решите уравнение

тоесть 3 целых девять десятых?

Да

3/14x - 8/21x = -0,659/42x - 16/42x = -0,65-7/42x = -0,651/6x = 0,65x = 3,9

3/14х - 0,59 = 8/21х - 1,248/21х - 3/14х = 1,24 - 0,5916/42х - 9/42х = 0,657/42х = 0,65 1/6х = 65/100 х = ( 13/20 ) : ( 1/6 ) х = 78/20 х = 3,9