Find the value of $x$ if $2 x + 3 = 5$ , by doing same operations on both sides.
(2 marks)

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Solution

$2 x + 3 = 5$

Subtracting 3 from both sides
⇒ $2 x + 3 - 3 = 5 - 3$
(0.5 marks)

⇒ $2 x + 0 = 2$
⇒ $2 x = 2$

Dividing by 2 on both sides
(0.5 marks)

⇒ $\frac{2 x}{2}$ = $\frac{2}{2}$
⇒ $x = 1$
(1 mark)

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