\(x-\left(7-x\right)=x-25.\)
\(x-7+x=x-25.\)
\(2x-7=x-25.\)
\(2x-x=7-25.\)
\(x=-18\)
x - (7 - x) = x - 25
<=> -7 + x = -25
<=> x - 7 = -25
<=> x = -25 + 7
<=> x = -18
x - (7 -x ) = x-25
\(\Leftrightarrow\)x - 7 + x -x= -25
\(\Leftrightarrow\)x -7= -25
\(\Leftrightarrow\)x = -18
#mã mã#