Respostas

2014-07-18T01:36:50-03:00
A) 4x= 22 + 6
4x= 28
x= 28/4
x= 7

b) 9= 2x + x
9= 3x
9/3 = x
3 = x

c) 8= 6x - 4x
8= 2x
8/2 = x
4= x

d) 3x + x = 9 -1
4x = 8
x= 8/4
x= 2

e) 4x + 2x = 7 + 11
6x = 18
x = 18/6
x= 3

f) 13x - 10x - x = 5 -1
2x = 4
x = 4/2
x= 2