I think ur in the wrong country
The picture isn’t visible it’s a black screen
I hope this helps. If I need to know explain further let me know.
S = 25 + 2f
s + f = 310
substitute s = 25 + 2f into the second equation
25 + 2f + f = 310
3f + 25 = 310
subtract 25 from both sides
3f = 285
divide both sides by 3
f = 95
faculty = 95
students = 310 - 95 = 215
