Respostas

2014-08-22T17:24:44-03:00
Hola !!!!!!!!!!!!!
vamos lá : sistemas lineares

x+y+z=905
x-y=60
x/y=7/6

x=60+y
60+y/y= 7/6
7y=360+  6y
y=360-----------------------> x=60+360=420

x+y+z=905
420+360+z=905
z=125

verificando:420+360+125=905

420-360=60
420/360= 7/6







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