Question

Solve 3x +1≤ 16, x E n

Answer 1

Given 3x +1 ≤ 16
=3x +1-1≤ 16-1
= 3x≤ 15 = x≤ 5
As x E n the solution set is = {1,2,3,4,5}

I hope this will help you
By DEVANSH

Answer 2

3x +1 ≤ 16

3x+1-1 ≤ 16-1 [subtract 1 from both]

3x ≤ 15

$\frac{3x}{3} \leqslant \frac{15}{3} \: \: \: \: \: \: \: \: \: \: \: { \: dividing \: by \: 3 \: on \: both} \:$
x ≤ 5

x =5



I hope this will help you



-by ABHAY