Answer:
![a=(f)/(d-e)-(b)/(c)](https://img.qammunity.org/2021/formulas/chemistry/college/t427yl83yy6cm3gyxqhrjprvikfee9rr6b.png)
Step-by-step explanation:
Hello.
In this case, for the equation:
![(a+b/c)(d-e)=f](https://img.qammunity.org/2021/formulas/chemistry/college/fc7b4n2un1g309h3n0x9qjm6dj01jjguq2.png)
For isolating a, we must first pass (d-e) to divide at the other side as it is initially multiplying:
![a+b/c=(f)/((d-e))](https://img.qammunity.org/2021/formulas/chemistry/college/9d12zs86cqxb8xtmaqvbn2m0fv40w681we.png)
Next, as b/c is adding, it passes to subtract at the other side in order to finally isolate a:
![a=(f)/(d-e)-(b)/(c)](https://img.qammunity.org/2021/formulas/chemistry/college/t427yl83yy6cm3gyxqhrjprvikfee9rr6b.png)
Best regards!