Решите уравнение: а) - 4,3x=14,62 б) 11/15y+9/10=8/15

а) - 4,3x = 14,62

-4 3/10x = 14 62/100

-43/10x = 1462/100

x = - 1462/100 : 43/10

x = - 1462/100 * 10/43

x = - 1462/43 * 10/100

x = - 34 * 1/10

x = - 34/10

x = - 3 4/10

x = - 3,4

Ответ: - 3,4

б) 11/15y + 9/10 = 8/15

11/15y = 8/15 - 9/10

11/15y = 24/30 - 27/30

11/15y = (24 - 27) / 30

11/15y = - (-24 + 27) / 30

11/15y = - (27 - 24) / 30

11/15y = - 3/30

11/15y = - 1/10

y = - 1/10 : 11/15

y = - 1/10 * 15/11

y = (-1 * 15) / (10 * 11)

y = - 15/110

y = - 3/22

Ответ: - 3/22