Respostas

2013-08-18T23:21:35-03:00
2x=5y
7x-6y=46

x=5/2y
7.5/2y-6y=46

x=5/2y
35y-12y=92

x=5/2y
23y=92

x=5/2y
y=92/23

x=5/2y
y=4

x=4.5/2
y=4

x=20/2
y=4

x=10
Y=4