Respostas

2013-03-21T14:35:31-03:00

5-(b+3)=3(b+2)

5-3b=3*2b

5+3=2b+3b

8=5b

b=8/5

A melhor resposta!
2013-03-21T14:45:44-03:00

3(b+2)+(b+3)-5=0

3b+6+b+3-5=0

(3b+b)+(6+3-5)=0

4b+4=0

4b= - 4

b= - 4/4

b= -1

 

 na duvida faz a prova:

 

 

5-(-1+3) = 3(-1+2)

5-(2) = 3(1)

3 = 3

 

 

 

 :::

 

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