I also dont know how to solve this one either. Please help! I just want to know how to solve it so i can do it on my own

Answer:
[tex]z=5[/tex]
Step-by-step explanation:
[tex]-\frac{3}{z}+\frac{7}{4z}=\frac{5}{z-25}\\\\\implies-\frac{12}{4z}+\frac{7}{4z}=\frac{5}{z-25}\\\\\implies-\frac{5}{4z}=\frac{5}{z-25}\\\\\implies125-5z=20z\\\\\implies25z=125\\\\\implies z=5[/tex]
Have a nice day, also mark brainliest please!