1/5 + 9/10 = 1/15 - 3/10x

Question

1/5 + 9/10 = 1/15 - 3/10x

Answer 1

2/10+9/10=1/15-3/10х
11/10=1/15-3/10х
3/10х=2/30-33/30
3/10х=-31/30
х=31/30 :3/10=310/90=62/18=31/9
х=31/9