Answer 1

2x - 7 ≥ 5x + 8 

2x - 7 ≥ 5x + 8 

2x - 5x ≥ 8 + 7 

-3x ≥ 15 

3x ≤ -15 

x ≤ -5 

Since, replacement set is R

Solution set= {x : x ∈ R and x ≤ -5}