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Número 2= 1/3x
Número 3= x-70
x+1/3x+x-70 = 0
3x+x+3x/3 = 70
3x+x+3x = 210
7x = 210
x= 210/7
x= 30
Número 1= 30
Número 2= 10
Número 3= -40
( 30+10-40 = 0 )
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