Soccerchickec
Soccerchickec
11-01-2015
Mathematics
Answered
How do you solve
-x +y=-5
-3x+4y=-12
Answer :
mariamikayla
mariamikayla
11-01-2015
[tex] \left \{ {{-x+y=-5} \ \ |(-4) \atop {-3x+4y=-12}} \right. \\\\ \left \{ {{4x-4y=20} \atop {-3x+4y=-12}} \right. \\ ======== \\ \boxed{x \ / =8} \\\\ -x+y=-5 \\\\ -8+y=-5 \\\\ y=-5+8 \\\\ \boxed{y=3}[/tex]
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konrad509
konrad509
11-01-2015
[tex]-x+y=-5|\cdot(-3)\\ -3x+4y=-12\\\\ 3x-3y=15\\ \underline{-3x+4y=-12}\\ y=3\\\\ -x+3=-5\\ -x=-8\\ x=8\\\\ \boxed{x=8,y=3} [/tex]
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