Resolva as inequancoes abaixo:
Soluções para a tarefa
Resposta:
a) x < - 69
b) x >/= 7
c) x >/= 2/5
d) x > 3
e) x < - 3/5
f) x >/= 2/5
g) x < 7
h) x < - 67
i) x < 5
j) x >/= 7
k) x </= - 57
l) x > - 2
Explicação passo a passo:
a)
6(x - 5) - 2(4x + 2) > 100
6x - 30 - 8x - 8 > 100
6x - 8x > 100 + 30 + 8
- 2x > 138
- x > 138/2 :(2)
- x > 69 x(-1)
x < - 69
b)
2x + 5 >/= - 3x + 40
2x + 3x >/= 40 - 5
5x >/= 35
x >/= 35/5 :(5)
x >/= 7
c)
20 - (2x + 5) </= 11 + 8x
20 - 2x - 5 </= 11 + 8x
- 2x - 8x </= 11 - 20 + 5
- 10x </= 16 - 20
- 10x </= - 4
- x </= - 4/10 :(2)
- x </= - 2/5 x(-1)
x >/= 2/5
d)
8x - 10 > 2x + 8
8x - 2x > 8 + 10
6x > 18
x > 18/6 :(6)
x > 3
e)
2(3x + 7) < - 4x + 8
6x + 14 < - 4x + 8
6x + 4x < 8 - 14
10x < - 6
x < - 6/10 :(2)
x < - 3/5
f)
20 - (2x + 5) </= 11 + 8x
20 - 2x - 5 </= 11 + 8x
- 2x - 8x </= 11 - 20 + 5
- 10x </= 16 - 20
- 10x </= - 4
- x </= - 4/10 :(2)
- x </= - 2/5 x(-1)
x >/= 2/5
g)
2x + 5 < - 3x + 40
2x + 3x < 40 - 5
5x < 35
x < 35/5 :(5)
x < 7
h)
6(x - 5) - 2(4x + 2) > 100
6x - 30 - 8x - 4 > 100
6x - 8x > 100 + 34
- 2x > 134
- x > 134/2 :(2)
- x > 67 x(-1)
x < - 67
i)
7x - 9 < 2x + 16
7x - 2x < 16 + 9
5x < 25
x < 25/5 :(5)
x < 5
j)
2x + 5 >/= - 3x + 40
2x + 3x >/= 40 - 5
5x >/= 35
x >/= 35/5 :(5)
x >/= 7
k)
6(x - 5) - 2(4x + 2) >/= 80
6x - 30 - 8x - 4 >/= 80
- 2x >/= 80 + 34
- 2x >/= 114
- x >/= 114/2 :(2)
- x >/= 57 x(-1)
x </= - 57
l)
20 - (7x + 4) < 30
20 - 7x - 4 < 30
- 7x < 30 - 16
- 7x < 14
- x < 14/7 :(7)
- x < 2 x(-1)
x > - 2
Espero ter ajudado! :)
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