Example 9 : Solve the equation 2x + 1 = x – 3, and represent the solution(s) on (i) the number line, (ii) the Cartesian plane. (ii) the Cartesian plane. and represent the solution(s) on (i) the number line Example 9 : Solve the equation 2x + 1 = x - 3 October 15, 2020 [...]