Omar tried to solve an equation step by step. \qquad\begin{aligned} 3x&=4.5\\\\ \\ \dfrac{3x}3&=\dfrac{4.5}3&\green{\text{Step } 1}\\\\ \\ x&=1.5&\blue{\text{Step } 2}\\\\ \end{aligned} 3x 3 3x ​ x ​ =4.5 = 3 4.5 ​ =1.5 ​ Step 1 Step 2 ​ Find Omar's mistake.