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24-04-2015
Mathematics

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y = -5x
-2x − y = 0
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24-04-2015

so use subsitution
y=-5x
-2x-y=0
so subsitute -5x for y since the first equation tells us that y=-5x
-2x-(-5x)=0
-2x+5x=0
3x=0
x=0
subsiutte
y=-5x
y=-5(0)
y=0

x=0
y=0

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