Question

3. Solve the formula v+f-e-2 for e Please help

Answer 1

I think you're referring to the formula

$v+f-e=2$

After all, we can't solve an equation for a variable if there's no equation to begin with!

With those assumptions made, add e to both sides:

$v+f=e+2$

And subtract 2 from both sides:

$v+f-2=e$

And we have solved the formula for e!