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