Question
Answer
$$2x+x\cdot(4+3)\cdot7=51x$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}2x+x\cdot(4+3)\cdot7& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2x+x\cdot7\cdot7 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}2x+49x \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}51x\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{4} + \color{blue}{3} = \color{blue}{7} $$ |
| ② | $$ x \cdot 7 \cdot 7 = 49 x $$ |
| ③ | Combine like terms: $$ \color{blue}{2x} + \color{blue}{49x} = \color{blue}{51x} $$ |
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