SOLUTION: Decide whether (-4,2) is a solution of the system. 3x+2y=-8 2x-y=-6

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Question 412434: Decide whether (-4,2) is a solution of the system.
3x+2y=-8
2x-y=-6
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Is (-4,2) a solution for this system:  NO

3x+2y=-8   | -12 + 4 = -8

2x-y=-6    | -8 - 2 ≠ -6



2x-y=-6  OR y = 2x+6

3x+2y=-8

3x + 2(2x+6) = -8

    7x = -20

     x = -20/7 or -2 6/7  and y = 2/7  (-40/7 + 42/7)



CHECKING our Answer***

 2*-20/7 - 2/7 = -42/7 = -6