Let the age of Sachin be **x**

Then by given conditions,

Bhargav's age= **2x** ( given that Bhargav is twice as old as Sachin)

Aarav's age = **2x+7** (given Aarav is 7 years older than Bhargav)

Then,

**(2x+7)+2x+x=87**

**2x+7+2x+x=87**

**2x+2x+x+7=87**

**5x+7=87**

**5x=87-7=80**

**x=80/5=16**

Therefore Sachin's Age=16