SOLUTION: Solve the system by elimination: 8x + 4y = 0 4x - 2y = 2

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Question 423895: Solve the system by elimination:
8x + 4y = 0
4x - 2y = 2

Found 2 solutions by linht117, MathLover1:
Answer by linht117(37) About Me  (Show Source):
You can put this solution on YOUR website!
a) 8x+4y=0
b) 4x-2y=2(*2)
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a) 8x+4y=0
b2)8x-4y=4
16x=4
x=1/4
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a)8(1/4)+4y=0
2+4y=0
4y/4=-2/4
y=-1/2
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a) 8(1/4)+4(-1/2)=0
b) 4(1/4)-2(-1/2)=2

Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

8x+%2B+4y+=+0........1
4x+-+2y+=+2.......2..multiply by 2
8x+%2B+4y+=+0........1
8x+-+4y+=+4.......2....now subtract from 1
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8x-8x+%2B+4y-%28-4y%29+=+0-4
+4y-%28-4y%29+=+-4
+4y%2B4y+=+-4
+8y+=+-4
+y+=+-4%2F8

+y+=+-1%2F2......now find x
4x+-+2%28-1%2F2%29+=+2
4x+-+cross%282%29%28-1%2Fcross%282%29%29+=+2
4x+-+%28-1%29+=+2
4x+%2B1+=+2
4x+=+2-1
4x+=+1

x+=+1%2F4