Question
Answer
$$t+1+2(2t+5)=5t+11$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}t+1+2(2t+5)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}t+1+4t+10 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}5t+11\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{2} $ by $ \left( 2t+5\right) $ $$ \color{blue}{2} \cdot \left( 2t+5\right) = 4t+10 $$ |
| ② | Combine like terms: $$ \color{blue}{t} + \color{red}{1} + \color{blue}{4t} + \color{red}{10} = \color{blue}{5t} + \color{red}{11} $$ |
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