Question

resolva as inequaçaoes: A) 2 x + 5 < - 3 x + 40 B)6 (x - 5 ) - 2 (4 x + 2 ) > 100

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
6x - 8x > 100 + 4 + 30
- 2x > 134  (-1)
2x < - 134
x < - 134/2
x < - 67