Question

resolva as inequacoes
a)5+3x ≥ -31
b)14x+28≤0
c)7-2x <9
d)1/2 + 2/3x > 3/2

Answer 1

Olá Dalva,

a)5+3x ≥ -31
3x≥ -31 - 5
3x≥-36
x≥ -36/3
x≥ -12

b)14x+28≤0
14x ≤ -28
x ≤ -28 / 14
x ≤ -2

c)7-2x <9
-2x < 9 - 7
-2x < 2 (-1)
2x > -2
x > -2/2
x > -1.

d)1/2 + 2/3x > 3/2
2/3x > 3/2 - 1/2
2/3x > 2/2
2/3x > 1
x > 1/(2/3)
x > _1_  . _3_
        1        2

x> 3/2
x > 1,5.

Espero ter ajudado!