Possible error in this equation?

Muttley

New member
Hi guys!

I think that the 2nd of these linie equation is written incorrectly, could anyone please confirm and correct me?

For this:

I am trying to find the spots "e" and "f"

The "e" part I can rewrite the equation, but with "f" I have problems with - should it be "f-d" on the numerator instead of "d-f"?

Subhotosh Khan

Super Moderator
Staff member
Why do you think it is incorrect?

Muttley

New member
hi!

I just can not figure out to rewrite the 2nd equation to isolate "f" the way it is written.

Could anyone pls write the steps to moving from isolated "alpha" to "f"?

Subhotosh Khan

Super Moderator
Staff member
alpha*(d - b) = d - f

f + alpha*(d - b) = d

f = - alpha*(d - b) + d

f = d - alpha*(d - b)

Muttley

New member
Thanks!

My math sure is getting rusty.....

much appreciated.

Muttley

New member
Subhotosh Khan said:
alpha*(d - b) = d - f

f + alpha*(d - b) = d

f = - alpha*(d - b) + d

f = d - alpha*(d - b)

one more question: is this also legit?:

alpha*(d - b) = d - f

alpha*(d - b) + f = d

f = d - alpha*(d-b)

Staff member
Yes, it is.