17-05-2017
Mathematics

contestada

solve the system of equations 5x + 2 y equals 12 5 x - 2 y equals 28

Respuesta :

24-05-2017

5x+2y=12 5x+2y=12
5x-2y=28 5(4)+2y=12
2y=12-20
10x=40 2y=-8
x=40/10 y=-8/2
x=4 y=-4

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