toán lớp 6 nhé mình viết nhầm
-14 - | x- 7| = -9 + (-15) - (-10) -27
<=> - | x - 7 | = - 9 - 15 + 10 - 27 + 14
<=> - | x - 7 | = - 27
<=> | x - 7 | = 27
\(\Leftrightarrow\orbr{\begin{cases}x-7=27\\x-7=-27\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x=34\\x=-20\end{cases}}\)
Vậy \(x\in\left\{34;-20\right\}\)
@@ Hock tốt
## Mirai
-14 - | x- 7| = -9 + (-15) - (-10) -27
-14 - | x- 7| = -24 + 10 - 27
-14 - | x- 7| = -14 - 27
-14 - | x- 7| = -41
| x- 7| = -14 - (-41)
| x- 7| = 27
\(\Rightarrow\orbr{\begin{cases}x-7=27\\x-7=-27\end{cases}}\)\(\Rightarrow\orbr{\begin{cases}x=34\\x=-20\end{cases}}\)
Vậy x \(\in\){ 34 ; -20 }
# HOK TỐT #
\(-14-\left|x-7\right|=-9+\left(-15\right)-\left(-10\right)-27\)
\(=>-14-\left|x-7\right|=-9-15+10-27\)
\(=>-14+9+15-10+27=\left|x-7\right|\)
\(=>\left|x-7\right|=27\)
\(=>\orbr{\begin{cases}x-7=27\\x-7=-27\end{cases}}=>\orbr{\begin{cases}x=34\\x=-20\end{cases}}\)
-14 - | x- 7| = -9 + (-15) - (-10) -27
-14 - | x- 7| = -24 + 10 - 27
-14 - | x- 7| = -14 - 27
-14 - | x- 7| = -41
| x- 7| = -14 - (-41)
| x- 7| = 27
\(\Rightarrow\orbr{\begin{cases}x-7=27\Rightarrow x=27+7=34\\x-7=-27\Rightarrow x=-27+7=-20\end{cases}}\)
Vậy................................................................................
