Janessa3745 Janessa3745

14-07-2017
Mathematics

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2x+3y=-2 4x+7y=-6 solve for the system of equations

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14-07-2017

elliminateion

multiply first equation by -2 and add to 2nd equation

-4x-6y=4
4x+7y=-6 +
0x+1y=-2

y=-2
sub back

2x+3y=-2
2x+3(-2)=-2
2x-6=-2
2x=4
x=2

(x,y)
(2,-2)

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