Solve the equation 2x+1=x-3, and represent the solution(s) on

i) the number line 

ii) the cartesian line

Dear Student

2x + 1 = x – 3

⇒ 2x – x = –3 – 1

⇒ x = –4

1) x = –4 can be represented on the number line as below:

2) x = –4 can be represent on the cartesian plane as below:

Cheers!!