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What is the intersection of the lines given by $2y=-x+3$ and $-y=5x+1$?

 Jul 10, 2019
 #2
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2y = -x + 3        y = 5x + 1

 

Rearranging the frst equation we have   x  = 3 - 2y

Sub this into the second equation for x and we have that

 

y = 5(3-2y) +1

y  =  15 - 10y + 1

11y  = 16

y = 16/11

 

So

 

x  =  3 - 2(16/11)

x = 3 - 32/11

x = 33/11 - 32/11  =   1/11

 

So...the intersection point is  ( 1/11, 16/11)

 

 

cool cool cool

 Jul 10, 2019

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