royaltyloyalty
royaltyloyalty
12-10-2015
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solve by elimination x+3y=-4 + y+x=0
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Аноним
Аноним
13-10-2015
x+3y=-4 x+3y=-4]
y+x=0 ]multiply minus===> -y-x=0 ]===elimination x===>2y=-4 ==>y=-2 x=2
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