Posted by clary on Sunday, May 27, 2012 at 3:53pm.
How many solutions are there for the linear system x – y = –5 and x + y = 1?

math  Henry, Monday, May 28, 2012 at 5:11pm
Eq1: x  y = 5
Eq2: x + y = 1
Add the Eqs:
2x = 4
X = 2.
In Eq2, substitute 2 for X:
2 + y = 1
Y = 3.
Solution = (x,y) = (2,3).
The lines intersect @ only 1 point.Therefore, we have only one solution.
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