реши уравнение: 2/5y + 3/10y - 2/15y = 1/6 срочно плз

2/5y + 3/10y - 2/15y = 1/612/30у + 9/30у - 4/30у = 1/6(12+9-4)/30у = 1/617/30у = 1/6у = 17/30 : 1/6y = 17*6/30y = 17/5 = 3 2/5

12\30у+9\30у-4\30у=1\617\30у=1\630у=1\6*1730у=17\6у=17\180