Respostas

2013-06-02T18:13:34-03:00

x/y = 2/9

x+y = 143

 

x= 143 - y

 

143 - y/y = 2/9

 

1287 - 9y = 2y

1287 = 11y

y = 117

 

x = 26 e y = 117