Respostas

2013-12-04T16:16:13-02:00


a) 7x

b) 3c + g

c) -4x

d) -c + 4g

2013-12-04T16:28:15-02:00
A)
3x + 4x =
x (3 + 4) = 7x
-----
B)
2g + 6c - g - 3c = 
2g - g + 6c - 3c =
g + 3c
-----
C) -5x + x = - 4x
-----
D)
g + c + 3g - 2c =
4g - c