11. Estimate the invested amount by a person

Deepak invested \(₹ x\) under simple interest for 10 years at 10\(\%\) per annum. If he had invested \(₹2x\) under simple interest for 15 years at the rate of interest 20\(%\) per annum then he would have received \(₹\)6000 more simple interest. Find the value of \(₹ x\)?

 

 Deepak invested amount is \((x)\) \(₹\)______