I have a 3 line chart for the same dimension and 3 different measures. How to combine all those in one.

This can be achieved with a combination of measures and dual-axis. Let’s say the 3 measures are-

1. Debt
   
2. Value and
   
3. Score
   

Now what you have to do is just put debt and value to the measured field and the same measure field to the row shelf also and place score field to next of measure field in the row shelf. Now make the score field as the dual-axis. This way you will be able to make it all 3 in one.