Respostas

2013-03-21T13:54:12-03:00

2(y+5)=y/2+25

2y+10=y/2+25

2y-y/2=25-10

(2*2y)-y/2=15

4y-y/2=15

3y/2=15

3y=2*15 ( multipliquei cruzado , 3y*1 e 2*15)

3y=30

y=30/3

y=10

 

 

2 2 2