Реши уровнения: 1/3x+1/x=4/15, 1/x-1/7x=2/7, 1/4x+1/x=5/16, 1/x-1/9x=2/9, 1/8х+1/х=3/8, 1/х-1/5х=2/15

1. х=5

2. х=3

3. х=4

4. х=4

5. х=3

6. х=6