11-(15+11)=x-(25-9)
11-26 =x-(25-9)
-15 =x-(25-9)
-15 =x-16
16+(-15) =x
1 =x
=> x=1
\(\text{a) 11-(15+11)=x-(25-9)}\)
\(\Leftrightarrow\text{11-15-11=x-16}\)
\(\Leftrightarrow\text{-15 = x-16}\)
\(\Rightarrow\text{x=1}\)
11-15-11=x-25-9
<=>-15=x-24
<=>x=-9
11 - (15 + 11) = x- (25 - 9)
=> -15 = x - 16
=> x= 1
a, 11-(15+11)=x-(25-9)
>11-15-11=x-16
>-15=x-16
>x=1
11 - (15+11)= x - (25-9)
=>11 -15-11= x -16
=>-15= x-16
=>x= -15+16
=>x=1