Ajuda matemática inequaçao!!!!?
a)x-2>10
b3+2>-7
c)5x+1>3x-15
d)2y-12>5y+3
e)9x-8>=7x+4
f)10-5x<=-20
g)4x+1>5x-13
h)2.(3x-4)>3(x-11)
i)3.(x-2)-(x+1)<=1.(3x+5)
j)7x-2(x+1)<10-3(x-2)
k)3(x+2)>2(2x+4)
l)x+5(x-1)<=4+3(x+7)
a)x-2>10
b3+2>-7
c)5x+1>3x-15
d)2y-12>5y+3
e)9x-8>=7x+4
f)10-5x<=-20
g)4x+1>5x-13
h)2.(3x-4)>3(x-11)
i)3.(x-2)-(x+1)<=1.(3x+5)
j)7x-2(x+1)<10-3(x-2)
k)3(x+2)>2(2x+4)
l)x+5(x-1)<=4+3(x+7)
Comments
http://www.mathway.com/ muito util resolve tudo
a)x-2>10
x > 10 + 2
x > 12
b)3+2>-7
se for 3x
3x > -7 - 2
3x > -9
c)5x+1>3x-15
5x - 3x > -15 -1
2x > -16
x > -8
d)2y-12>5y+3
2y - 5y > 3 + 12
-3y > 15
-y > 5 (.-1)
y < 5 [muda o sinal, pois multiplicou por -1]
e)9x-8>=7x+4
9x - 7x >= 4 + 8
2x >= 12
x >= 6
f)10-5x<=-20
-5x <= -20-10
-5x <= -30
-x <= -6
x >= 6
g)4x+1>5x-13
4x - 5x > -13 - 1
-x > -14
x < 14
h)2.(3x-4)>3(x-11)
6x - 8 > 3x - 11
6x - 3x > -11 + 8
3x > -3
x > -1
i)3.(x-2)-(x+1)<=1.(3x+5)
3x - 6 - x - 1 <= 3x + 5
3x - x - 3x <= 5 + 1+6
-x <= 12
x >= -12
j)7x-2(x+1)<10-3(x-2)
7x - 2x - 2 < 10 -3x + 6
7x - 2x + 3x < 10 + 6 + 2
8x < 18
x < 6/4
k)3(x+2)>2(2x+4)
3x + 6 > 4x + 8
3x - 4x > 8 - 6
-x > 2
x < 2
l)x+5(x-1)<=4+3(x+7)
x² - x + 5x - 5 <= 4 + 3x + 21
x² - x + 5x - 3x - 5 - 4 - 21 <=0
x² + x - 30 <= 0
(x + 6)(x -5) <=0
x <= 6
x <= 5