Номер 146(а,б).............
146а) х = (4/15) / (2/5) =(4*5) / (15*2) = 2/3 146б) у = ((5/6 ) - (3/4)) / (2/15) = ((10/12)-9/12)) / (2/15) = = (1/12)*(15/2) = 5/8
А) : x = * x = x = : x = * x = б) y + = y = - * y = = y = : y = * y =