x + 74 = -20 + -318
x + 74 = -338
x= -338 - 74
x= -412
\(\left|x+74\right|-\left|-318\right|=\left|-20\right|\)
\(\left|x+74\right|-318=20\)
\(\left|x+74\right|=20+318=338\)
\(\Rightarrow\hept{\begin{cases}x+74=338\\x+74=-338\end{cases}}\Rightarrow\hept{\begin{cases}x=264\\x=-412\end{cases}}\)
Ta có :
\(\left|x+74\right|-\left|-318\right|=\left|-20\right|\)
\(\left|x+74\right|-318=20\)
\(\left|x+74\right|=20+318=338\)
\(\Rightarrow\orbr{\begin{cases}x+74=338\\x+74=-338\end{cases}}\Rightarrow\orbr{\begin{cases}x=338-74\\x=-338-74\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=264\\x=-412\end{cases}}\)
Ủng hộ mk nha !!! ^_^
x + 74 = -20 + -318
x + 74 = -338
x= -338 - 74
x= -412