SOLUTION: Find the point of intersection of the pair of straight lines. y= −10x-5 −y =11x+ 9

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Question 1087563: Find the point of intersection of the pair of straight lines.
y= −10x-5
−y =11x+ 9
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
(1) +y+=+-10x+-+5+
(2) +-y+=+11x++%2B+9+
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Add the equations
+0+=+-10x+%2B+11x+%2B+4+
+0+=+x+%2B+4+
+x+=+-4+
Put this result back into (1) or (2)
+y+=+-10%2A%28-4%29+-+5+
+y+=+40+-+5+
+y+=+35+
the intersection is ( -4, 35 )
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check:
(1) +35+=+-10%2A%28-4%29+-+5+
(1) +35+=+40+-+5+
(1) +35+=+35+
and
(2) +-35+=+11%2A%28-4%29++%2B+9+
(2) +-35+=+-44+%2B+9+
(2) +-35+=+-35+
OK