Question

Solve for x in the following in-equation, if the replacement set is R; 

x + 7 ≥ 15 + 3x 

Answer 1

x + 7 ≥ 15 + 3x 

x + 7 ≥ 15 + 3x 

x - 3x ≥ 15 - 7

-2x ≥  8 

2x ≤ -8 

x ≤ -4 

Since, replacement set is R

Solution set= {x : x ∈ R and x ≤ -4}