MATHEMATICS · Multi-part · AoPS · Mathematics · One-Variable Linear Equations · One-Variable Linear Equations
Problem
Rahul was asked to solve the equation x−4=11. He wrote the answer x=−15.
(i) Identify and explain the conceptual error in Rahul’s working.
(ii) Determine the correct value of x.
(iii) Verify your answer by substituting it back into the original equation.