Respostas

2013-09-30T00:05:06-03:00
((x +  \frac{x}{5} ) -  \frac{x}{2} )5
= ((x +  \frac{5x + x}{5} ) -  \frac{x}{2} )5
= (x +  \frac{6x}{5}  \frac{x}{2} )5
= (x +  \frac{12x - 5x}{10} ) 5
= (x +  \frac{7x}{10} ) 5 
= x +  \frac{7x}{2}
= 3,5x