Question
Answer
$$x^2+7+3x^2=4x^2+7$$
Explanation
| $$ \begin{aligned}x^2+7+3x^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4x^2+7\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{x^2} +7+ \color{blue}{3x^2} = \color{blue}{4x^2} +7 $$ |
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