Respuestas

2012-06-23T22:44:17+02:00

de susticion

 

2y+2x=30

yx=50

 

y+x=15

y=50/x

 

50/x+x=15

50+x²=15x

x²-15x+50=0

x²-5x-10x+50=0

x(x-5)-10(x-5)=0

(x-10)(x-5)=0

x=10 ∨ x=5

 

y=50/10 ∨ y=50/5

y=5 ∨ y=10

 

(10,5),(5,10)