Решите уравнение.. 1/5х + 9/10=1/15х-3/10

1/5х + 9/10 = 1/15х - 3/10
1/5х + 9/10 - 1/15х + 3/10 = 0
3/15х - 1/15х + 12/10 = 0
2/15х = -12/10
х = -12/10 : 2/15
х = -12/10 × 15/2
х = -6/2 × 3/1
х = -18/2
х = -9
ответ: -9