Question

Resolva as inequações U = N
a) 2x + 5 < – 3x +40
b) 6(x – 5) – 2(4x +2) > 100
c) 7x – 9 < 2x + 16

Answer 1

a) 2x + 5 < - 3x + 40
2x + 3x < 40 - 5
5x < 35
x < 35/5
x < 7

b) 6(x - 5) - 2(4x + 2) > 100
6x - 30 - 8x - 4 > 100
2x - 34 > 100 
2x > 100 + 34
2x > 134
x > 134/2
x > 67

c) 7x - 9 < 2x + 16
7x - 2x < 16 + 9
5x < 25
x < 25/5
x < 5

Espero ter ajudado, bjs!!