how the helll do you do substitution and elimination ?? any body

Question

shadowfiend · Answer

Have a look at your original question and see if that helps.

anonymous · Answer

substitution is really difficult to explain but elimination is very easy.
i.e when you have x+3y=4
                           x-3y=6 you cancel out the y's and keep the x's
but if its like   x+9y=10
                     3x+9y=20 then u just add negative 1
                    (3x+9y=20)-1 multiply then add both equations, you add them together like -2x=-10 then divide