Question

resolva as inequaçoes
a)5x-4<7
b)4x-7<1
c)2x+10>12
d)3(x-1)>21

Answer 1

Resolução:

a)

5x - 4 < 7

5x < 7 + 4

5x < 11

x < 11 / 5


b)

4x - 7 < 1

4x < 1 + 7

4x < 8

x < 8 / 4

x < 2

c)

2x + 10 > 12

2x > 12 - 10

2x > 2

x > 2 / 2

x > 1

d)

3(x - 1) > 21

3x - 3 > 21

3x > 21 + 3

3x > 24

x > 24 / 3

x > 8