We can do the following steps to solve the equation.
Step 1: We apply the distributive property. For this, the number outside the brackets is multiplied by everything that is inside the brackets.
Then, we have:
![\begin{gathered} (5)/(4)(x-(8)/(5))=13 \\ (5)/(4)\cdot x-(5)/(4)\cdot(8)/(5)=13 \\ (5)/(4)x-(5\cdot8)/(4\cdot5)=13 \\ (5)/(4)x-(8)/(4)=13 \\ (5)/(4)x-2=13 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/shavpt4yxrvdwo4wmvmhg3pfetnyyrvufj.png)
Step 2: We add 2 from both sides.
![\begin{gathered} (5)/(4)x-2=13 \\ (5)/(4)x-2+2=13+2\rbrack \\ (5)/(4)x=15 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/mc39rwqxmexbfi8c0th26ipet9xrfwg2cl.png)
Step 3: We multiply by 4 from both sides.
![\begin{gathered} 4\cdot(5)/(4)x=15\cdot4 \\ 5x=60 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/9rbc6wxwqvg2c31ynuqqv3mzthaad94uin.png)
Step 4: We divide by 5 from both sides.
![\begin{gathered} (5x)/(5)=(60)/(5) \\ x=12 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/1ibkkya4xo5i4mvqlm10aezrjomwhkrn3r.png)
Therefore, the value of x is 12.