Answer
$$x^1+2x^1=3x$$
Explanation
| $$ \begin{aligned}x^1+2x^1& \xlongequal{ }x+2x \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3x\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{x} + \color{blue}{2x} = \color{blue}{3x} $$ |
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