Question

who is good at the maths/ algebra??

which answer is a solution to the open sentence
8 < 2b or 2b + 15 < 5

a.b > - 3 or b < 4

b. b > 4 or b <-5

c.b < - 2 or b>3

d.b > - 1 or b< 3

Answer 1

8 < 2b
8/2 < b
4 < b

2b + 15 < 5
2b < 5 - 15
2b < -10
b < -10/2
b < -5

answer is : b > 4 or b < -5