When solving 3 equations with 3 unknowns as well as solving 2 equations with 2 unknowns. I'm not quite clear with the substitution method where you substitute something into the equation.
And im not quite sure about when you are given such an equation such as this one shown from quite a while back
http://www.slideshare.net/heviatar/pre-cal30-s-oct27-presentation. Im just not sure about the squaring the square-root. I know you square the other side also but then you end off with a radical and the variables that came along with it after isolating the variables.
Thanks Mr . K if what I asked gets cleared up so im not in mud anymore =p
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