A student checks whether satisfies the equation and writes the following steps:

MATHEMATICS · Multi-part · CBSE · Mathematics · Algebra Play · Algebra Play

Problem

A student checks whether

x = 3

satisfies the equation

2x + 4 = 11

and writes the following steps:

2(3) + 4 = 6 + 4 = 11.

(i) Identify the arithmetic error in the student’s working. (ii) Perform the correct calculation and state whether

x = 3

is a solution of the equation.