a, |5-x|=12
=> \(\left[ \begin{array}{l}5-x=12\\5-x=-12\end{array} \right.\)
=> \(\left[ \begin{array}{l}x= -7\\x=17\end{array} \right.\)
Vậy \(\left[ \begin{array}{l}x= -7\\x=17\end{array} \right.\)
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b, 25+x=250
=> x= 250-25
=> x= 225
Vậy x=225
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c, 15+ (x-10)=23
=> x-10= 8
=> x= 8+ 10
=> x=18
Vậy x=18
-------------------------
d, 11-(-53+x)=97
=> 11+53-x=97
=> 64-x=97
=> x= -33
Vậy x=-33
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e, 61+ (x-23)=91
=> 61+ x-23=91
=> x+ (61-23)=91
=> x+ 38=91
=> x= 91-38
=> x= 53
Vậy x=53
