SOLUTION: given the following system : 5x + y = -2 2x + 3y= 7 the value of xy is ?

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Question 365488: given the following system :
5x + y = -2
2x + 3y= 7
the value of xy is ?

Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!

Hi,
5x + y = -2
2x + 3y= 7
-15x -3y = -2*-3
2x + 3y= 7
-13x = 13
x = -1
y = 3 (-5x -2 )
xy = -3
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