1. x/20 = (3/8)-(4/5)
2. solve
3. My attempt as far as I can tell there is no LCM so
3/8 becomes 15/40 4/5 becomes 32/40
(15/40)-(32/40)= 17/40 which equals 8.5/20 which means x=8.5
For some reason I don't think I got the right answer?
O.k. I am trying to figure out what defines an algebraic fraction. I know it has something to do with the denominator but for the life of me I can not make any sense out of my textbook examples. Like 3/2x = 0 I guess 3/x*x = 3 divided by no actual number which would be zero but that is the...
As for the 1 thing. I think the calculator on webmath is messed up. It said (s+t)/(s-t) =1 But my calculator says in doing so you would have to divide by zero which cannot be done.
Sorry It was perform the indicated operation. Not solve the equation. Honestly i did not know an equation had to have a = . The instructor at the community college I am going to never spent any time on terms.
O.k. Here goes. The equation is
20s^2+9st+t^2 2s^2-7st+3t^2 5s^2+6st+t^2
-------------- * --------------- * --------------
5s^2-14st-3t^2 t^2+3st-4s^2 10s^2-3st-t^2
factored out to
(5s+t)(4s+t) (2s-t)(s-3t) (5s+t)(s+5t)
------------*-----------*-------------...
O.K I factored and reduced an equation I am doing down to (s+5t)/(t-s)
I could not figure it out so I went to webmath and used a calculator to find out the answer so I could reverse solve the problem. The answer is 1 according to webmath. Any hints on how to get started on this becuase I...
O.k I went back over the problem. I then see how I forgot to take into account the r as part of my GCF.
Just wondering how did you get from 2r in 2r(r+5)(r-2)= 0 to r2+ 5r= r(r+ 5)= 0? I thought 2r* r = 2r^3?