Answer
$$-6x\cdot2+1+7x=-5x+1$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-6x\cdot2+1+7x& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-12x+1+7x \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-5x+1\end{aligned} $$ | |
| ① | $$ 6 x \cdot 2 = 12 x $$ |
| ② | Combine like terms: $$ \color{blue}{-12x} +1+ \color{blue}{7x} = \color{blue}{-5x} +1 $$ |
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