Tap the blue circles to see an explanation.
| $$ \begin{aligned}x-32x-8x\cdot2-16x\cdot2-9& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}x-32x-16x-32x-9 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}-79x-9\end{aligned} $$ | |
| ① | $$ 8 x \cdot 2 = 16 x $$ |
| ② | $$ 16 x \cdot 2 = 32 x $$ |
| ③ | Combine like terms: $$ \color{blue}{x} \color{red}{-32x} \color{green}{-16x} \color{green}{-32x} -9 = \color{green}{-79x} -9 $$ |