Решите уравнение -30×(1 5\6x-3 1\5)=231

-30 * (1 5/6 x - 3 1/5) = 231
-30 * (11/6 x - 16/5) = 231
-30 * (55/30 x - 96/30) = 231
55/30 x - 69/30 = 231 : (-30)
55/30 x - 69/30 = -231/30
55/30 x = -231/30 + 69/30
55/30 x = -162/30
x = -162/55
x = -3 52/55

1 5/6х-3 1/5=231÷-30
1 5/6х -3 1/5=-7,7
1 5/6х =-7,7+3 1/5=-7 7/10 +3 2/10
1 5/6х=-4 5/10
х=-4 5/10÷1 5/6
х=135/55=2 25/55=2 5/11