Question
Answer
$$x\cdot2+3x-70x\cdot2-x-42=-136x-42$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}x\cdot2+3x-70x\cdot2-x-42& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2x+3x-140x-x-42 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-136x-42\end{aligned} $$ | |
| ① | $$ 70 x \cdot 2 = 140 x $$ |
| ② | Combine like terms: $$ \color{blue}{2x} + \color{red}{3x} \color{green}{-140x} \color{green}{-x} -42 = \color{green}{-136x} -42 $$ |
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