<u><em>subsitution</em></u> means subsituteing something for another and getting the answer the way to do this is to get an easy equation and make it equal to only one placeholder so y=2x so you can subsitute y for 2x anywhere you see a y 3x+y=5 subsitutute 3x+2x=5 5x=5 divide both sides by 5 x=1 subsitute y=2(1) y=2
<u><em>elimination</em></u> is when you elimintate one of the terms by adding the equations together and canceling som of them out so y=2x subtract y from both sides 0=2x-y or 2x-y=0
add this to the second equation 3x+2x+y-y=0+5 5x=5 divide both sides by 5 x=1 subsitute y=2(1) y=2