Respostas

2014-01-13T11:16:04-02:00
a) y= x-7

0= x-7
-x=-7
x=7

b) y=-x+10
0= -x+10
x= 10

c)y=6-2x
0= 6-2x
2x=6
x= 3

d)y=4x+3
0=4x+3
x= -3/4

e)y=2-9x
0=2-9x
9x=2
x= 2/9

f) y=1/2x+5
0=1/2x+5
x= -10

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