a,
11 - (-53+x) = 97
=> 64 - x = 97
=> x = 64 - 97
=> x = -33
câu b
-(x+84)+213 = -16
=> -x - 84 + 213 = - 16
=> - x + 129 = - 16
=> -x = - 16 - 129
=> -x = -145
=> x= 145
a.11-(-53+x)=97 b.-(x+84)+213=-16
11+53-x =97 -(x+84) =-16-213
64-x =97 -(x+84) =-229
x =64-97 =>x+84=229
x =-33 x =229-84
Vậy x=-33 x =145
Vây x=145
a,11-(-53+x)=97 b,-(x+84)+213= -16
-53+x=11-97 -(x+84)=-16-213
x= - 86+53 -(x+84)=-229
x= -33 x-84=-229
x=-229+(-84)
x=-313