Question

2x+3 less than or equal to 5

Answer 1

$2x+3 \leq 5 \\ \\ (2x+3)-3 \leq (5)-3 \\ \\ 2x \leq 2 \\ \\ \frac{2x}{2} \leq \frac{2}{2} \\ \\ x \leq 1 \\ \\x=( -\infty} ,1]$

Answer 2

2x + 3 ≤ 5
      -3   -3
      2x ≤ 2
      2x ≤ 2
       2     2
       x =  1