Question 282223: systems of equations: substitution
x+y=6
y=x
how do I solve that by substitution? Found 2 solutions by Mathematicians, jim_thompson5910:Answer by Mathematicians(84) (Show Source):
You can put this solution on YOUR website! Check this cool thing out.
We said y = x right?
Then this equals combine like terms solve for y.
since
There you go ;)
You can put this solution on YOUR website! Simply plug in into to get (notice how I replaced 'y' with 'x'). Now solve for 'x'. Once you have a solution in terms of 'x', use it to find the solution in terms of 'y'.
Note: in this case, the two solutions of 'x' and 'y' will be the same (since )