Question

Solve for x in the following in equation, if the replacement set is N<10: 

 2x + 1 < 17 

Answer 1

2x + 1 < 17

2x + 1 < 17

⇒  2x < 17 - 1 16

⇒ x <2

⇒ x < 8

But {x : x E N; N < 10} 

Therefore, solution set x = {1,2,3,4,5,6, 7}