Question

Resolva as inequações:
a) 2x – 3 < 6
b) 7x + 8 ≥ 3x + 5
c) 3(x – 7) + 2x ≤ 10 – 4 x
d) 4x + 2x > 15

Answer 1

a) 2x - 3 < 6

2x < 6 + 3

x < 9/2

b) 7x + 8 ≥ 3x + 5

7x - 3x ≥ 5 - 8

4x ≥ - 3

x ≥ -3/4

c) 3(x - 7) + 2x ≤ 10 - 4x

3x - 21 + 2x ≤ 10 - 4x

3x + 2x + 4x ≤ 10 + 21

9x ≤ 31

x ≤ 31/9

d) 4x + 2x > 15

6x > 15

x > 15/6 (divide o 15 e 6 por 3)

x > 5/2

boa sorte!! =)