Answer
$$2(3x+4)-x=5x+8$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}2(3x+4)-x& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}6x+8-x \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}5x+8\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{2} $ by $ \left( 3x+4\right) $ $$ \color{blue}{2} \cdot \left( 3x+4\right) = 6x+8 $$ |
| ② | Combine like terms: $$ \color{blue}{6x} +8 \color{blue}{-x} = \color{blue}{5x} +8 $$ |
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