It is given that,
→ a - 6 = 13
Now we have to,
find the value of a in the equation.
→ a - 6 = 13
→ a = 13 + 6
→ a = 19
Now the required value of a is 19.
Let's check the solution,
→ a - 6 = 13
→ 19 - 6 = 13
→ 13 = 13
→ LHS = RHS
Hence, the equation is proved.