Bài 95 :
\(\Leftrightarrow11-15-11=x-25+9\)
\(\Leftrightarrow-15+25-9=x\)
\(\Leftrightarrow x=1\)
Bài 95:
11-(15+11)=x-(25-9)
11-26=x-16
-15=x-16
x=-16+15
x=-1
Vậy x=-1
Bài 96:
a) 2-x=17-(-5)
2-x=22
x=2-22
x=-20
Vậy x=-20
b)x-12=(-9)-15
x-12=-24
x=-24+12
x=-12
Vậy x=-12