Question
Answer
$$35x\cdot2+4x-15-(2x\cdot2+2x)=68x-15$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}35x\cdot2+4x-15-(2x\cdot2+2x)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}70x+4x-15-(4x+2x) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}74x-15-6x \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}68x-15\end{aligned} $$ | |
| ① | $$ 35 x \cdot 2 = 70 x $$$$ 2 x \cdot 2 = 4 x $$ |
| ② | Combine like terms: $$ \color{blue}{70x} + \color{blue}{4x} -15 = \color{blue}{74x} -15 $$Combine like terms: $$ \color{blue}{4x} + \color{blue}{2x} = \color{blue}{6x} $$ |
| ③ | Combine like terms: $$ \color{blue}{74x} -15 \color{blue}{-6x} = \color{blue}{68x} -15 $$ |
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