25-01-2015
Mathematics

contestada

x=2y-1
3x-2y=-3
What are the coordinates

Respuesta :

25-01-2015

3x-2y=-3 (label equation 1) and x=2y-1 (label equation 2)
3(2y-1)-2y=-3 (sub 2 into 1)
6y-3-2y=-3
4y-3=-3
+3 +3
4y=0
y=0
sub y=o into equation 2
x= 2(0)-1
x=-1
therefore the co-ordinates are (-1,0)

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