a, \(\Leftrightarrow\)\(2x=-32\)
\(\Leftrightarrow\)\(x=-16\)
b,\(\Leftrightarrow\)\(25-\left(5x-3\right)=64\)
\(\Leftrightarrow\)\(5x-3=-39\)
\(\Leftrightarrow\)\(5x=-36\)
\(\Leftrightarrow\)\(x=-7,2\)
c,\(\Leftrightarrow\)\(25-\left(x-5\right)=15\)
\(\Leftrightarrow\)\(x-5=10\)
\(\Leftrightarrow\)\(x=15\)