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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