Tap the blue circles to see an explanation.
| $$ \begin{aligned}3(x+5)+8x& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3x+15+8x \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}11x+15\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{3} $ by $ \left( x+5\right) $ $$ \color{blue}{3} \cdot \left( x+5\right) = 3x+15 $$ |
| ② | Combine like terms: $$ \color{blue}{3x} +15+ \color{blue}{8x} = \color{blue}{11x} +15 $$ |