Quandaries
and Queries 

I'm take grade 10 academic math and we just started the substitution method. My question is, If you have a problem for ex. y=x1 and for the first step your suppose to Isolate one variable. My teacher says to take the first one that's isolated to start with. But in this problem there is 2 already isolated, y and x. The point where i got stuck is here: 

Hi Kayla, You have the two equations
and you have correctly recognized that the first equation already has y isolated. The method is then to replace y in the second equation by this value. That is, in the second equation, every place you see y, substitute x  1. The second equation then becomes
Does this help? Let me know if you still have difficulty finishing this problem. Harley 

