MaMariah MaMariah

29-08-2016
Mathematics

contestada

Solve the system of equations by elimination.
3x+4y=31
2x-4y=-6

Respuesta :

29-08-2016

Hello,

3x+4y=31 ==>4y=31-3x
2x-4y=-6==>2x-(31-3x)=-6==>5x=-6+31==>5x=25
==>x=5 and y=(31-3*5)/4=4

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