Question
Answer
$$0.9x+x-1-(0.7x+4)=x-5$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}0.9x+x-1-(0.7x+4)& \xlongequal{ }0x+x-1-(0x+4) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}x-1-(0x+4) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}x-1+0x-4 \xlongequal{ } \\[1 em] & \xlongequal{ }x-10x-4 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}x-5\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{0x} + \color{blue}{x} -1 = \color{blue}{x} -1 $$ |
| ② | Remove the parentheses by changing the sign of each term within them. $$ - \left( 0x+4 \right) = 0x-4 $$ |
| ③ | Combine like terms: $$ \color{blue}{x} \color{red}{-1} \color{blue}{0x} \color{red}{-4} = \color{blue}{x} \color{red}{-5} $$ |
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