09-05-2016
Mathematics

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Solve the following systems of linear equations. [3x+7y= -4 and 2x+5y= -3]

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09-05-2016

eliminate
multiply first equatin by -2
mulitply second by 3 and add them

-6x-14y=8
6x+15y=-6
add them
y=2
sub

3x+7(2)=-4
3x+14=-4
minus 14
3x=-18
divide 3
x=-6
(-6,2)

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