Posted by shelby on Tuesday, February 26, 2008 at 8:33am.
okay i am comepletely stuck on this math prob....:
x + 5y  10 = 0
x = 2y  8
i know the answer is
20/7 , 18/7
but i have no idea how they got it so
someone
PLZ HELP!!!!

math  Tracy, Tuesday, February 26, 2008 at 9:36am
The second equation is telling you what x is..since it says " x=2y8" this tells you that wherever you see an x you can replace it with that equation, so you would get:
(2y8)+5y10=0
so then you would just solve for y to get 18/7. So now you know what y is you can put that answer in either equation and solve for x. for example:
x=2(18/7)8
so x=20/7
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