Yalivera
Yalivera
05-10-2016
Mathematics
contestada
X+y=4
X-3y=12
Graph?
Respuesta :
apologiabiology
apologiabiology
05-10-2016
I'll solve it algebraically
x+y=4
x-3y=12
multiply first equatoin by -1 and add to second
-x-y=-4
x-3y=12 +
0x-4y=8
-4y=8
divide both sides by -4
y=-2
sub back
x+y=4
x+-2=4
add 2 to both sides
x=6
x=6
y=-2
(6,-2)
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