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Find the mistake in one-step equations

Omar tried to solve an equation step by step.
3x=4.53x3=4.53Step 1x=1.5Step 2\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}
Find Omar's mistake.
Choose 1 answer:
Choose 1 answer: