Respuestas

2012-12-11T01:28:30+01:00

x = 4 - 2y 

2 (4 - 2y) - 3y = 6

8 - 4y -3y = 6

2 = 7y

2/7 = y

x + 2(2/7) = 4

x +4/7 = 4

x = 32/7