Respuestas

2013-01-28T17:59:48+01:00

a+3a+9a+a = (1 + 3 + 9 +1)a =14a

 

 

-8/3x5y-3/4x5y-7/2x5y = (-8/3 - 3/4 - 7/2)x5y = (-32 -9 -42)/12 x5y = -83/12 x5y

 

 

2013-01-28T19:22:10+01:00

a+3a+9a+a = (1 + 3 + 9 +1)a =14a

 

 

-8/3x5y-3/4x5y-7/2x5y = (-8/3 - 3/4 - 7/2)x5y = (-32 -9 -42)/12 x5y = -83/12 x5y