kit0058
kit0058
02-03-2017
Mathematics
contestada
solve by elimination
Respuesta :
roseberline
roseberline
02-03-2017
2x - 2y = -4
-3x -3y = 0
_____________________
-1x - 5y = -4
Answer Link
H1a2r3s4h5
H1a2r3s4h5
02-03-2017
2x-2y=-4
Multiply eq.by 3
6x-6y=-12
-3x-3y=0
Multiply eq.by 2
-6x-6y=0
from both new eq.
6x-6y=-12
-6x-6y=0
So adding both eq. We get
-12y=-12
So y=1
From eq.1
2x-2y=-4
2x-2(1)=-4
2x-2=-4
2x=-4+2
2x=-2
x=-1
so x=-1 and y=1
Answer Link
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