Respuesta :

Maybe try this 2x+y=16
3x-y=4
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Add the two equations to solve for "x":
5x = 20 
x = 4
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Substitute to solve for "y":
2*4 + y = 16
y = 8
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Solution: (4,8)
for the first one its x=8 y=16
second one x= 1.33 y=-4