Respostas

2013-11-27T16:39:46-02:00
A) 5x=31+8
5x=39
x=39/5
x=7.8


b)4x+16=-12
4x=-12-16
4x=-28
x=-28/4
x=-7


c)
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2013-11-27T16:40:28-02:00
A)
5x-8=31
5x=31+8
5x=39
x=39/5 ou x= 7,8

b)
4x+16=-12
4x=-12-16
4x=-28
x=-28/4
x=-7


c)
5.(m-2)+4=19
5m-10+4=19
5m=19+10-4
5m=25
m=25/5
m=5
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