Question
Solve: 2.4x - 3 = 4.2

Answer

2.4x - 3 = 4.2
⇒ 2.4x = 4.2 + 3
⇒ 2.4x = 7.2
$\Rightarrow x=\frac{7.2}{2.4}$
⇒ x = 3

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