Respostas

2014-02-20T11:13:03-03:00
A) N+3=10  N=10-3   N=7

b)N-5=35  N=35+5    N=40

c)2.N=18  2N=18     N=18/2   N=9
2014-02-20T11:15:49-03:00
Letra a : 

N + 3 = 10
N = 10 - 3
N = 7 

Letra b : 

N - 5 = 35
N = 35 + 5
N = 40

Letra c : 

2.N = 18
2N = 18
N = 18 / 2
N = 9
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