Let the age of Han = h
Part A : Given : Han's age increased by 21 is 64.
So, the equation that represent the Han's age will be :
![h+21=64](https://img.qammunity.org/2023/formulas/mathematics/college/j04l701aye0ockcei0nzip853ibyg90440.png)
Solve for h :
![\begin{gathered} h+21=64 \\ h=64-21 \\ \\ h=43 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/44flxpb2cy917zk799e34ezz21yncui96n.png)
Part B : If The difference of Han's age and 17 is 54
So, the equation will be :
![h-17=54](https://img.qammunity.org/2023/formulas/mathematics/college/8r8fudze5jppfbkcp8fl1m25103ofhx30e.png)
in this case h will be : h = 54 + 17 = 71