Respostas
respondido por:
14
42)
a) 30/x =6
x=5.
b) x=-4
e) x= 15
c) x=4
d) x=-1
f) x=7
43 )
a) 2 +1/x = 4/x
2 = 3/x
x=3/2
b) 3/x + 4/5x=1/10
3.5/5x+4/5x = 1/10
15/5x + 4/5x =19/5x=1/10
5x/19=10
x/19=2
x=38
c)
3/2-(x+2)/3x=-11/6x
3/2=(x+2)/3x -11/6x
3/2=(2x+6)/6x -11/6x
3/2=(2x-5)/6x
Divida tudo por 2
Logo
3=(2x-5)/3x
9x=2x-5
7x=-5
x=-5/7
a) 30/x =6
x=5.
b) x=-4
e) x= 15
c) x=4
d) x=-1
f) x=7
43 )
a) 2 +1/x = 4/x
2 = 3/x
x=3/2
b) 3/x + 4/5x=1/10
3.5/5x+4/5x = 1/10
15/5x + 4/5x =19/5x=1/10
5x/19=10
x/19=2
x=38
c)
3/2-(x+2)/3x=-11/6x
3/2=(x+2)/3x -11/6x
3/2=(2x+6)/6x -11/6x
3/2=(2x-5)/6x
Divida tudo por 2
Logo
3=(2x-5)/3x
9x=2x-5
7x=-5
x=-5/7
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