Respostas

2013-09-30T09:42:55-03:00
X+ 4x - 7x +12

5x-7x +12

-2x +12=0
 x= - 12 /2
x=-6


 
X+ 4x - 7x +12

5x-7x +12

-2x +12=0
x= - 12 /2
x=-6