\(\begin{array}{l}
a)156 - (x + 61) = 82\\
\,\,\,\,\,\,x + 61 = 156 - 82\\
\,\,\,\,\,x + 61 = 74\\
\,\,\,\,\,x = 74 - 61\\
\,\,\,\,\,x = 13\\
b)\,(x - 35) - 120 = 0\\
\,\,\,\,\,x - 35 = 0 + 120\\
\,\,\,\,\,x - 35 = 120\\
\,\,\,\,\,x = 120 + 35\\
\,\,\,\,\,x = 155\\
c)\,\,124 - (x - 118) = 217\\
\,\,\,\,\,x - 118 = 124 - 217\\
\,\,\,\,\,x - 118 = - 93\\
\,\,\,\,\,x = - 93 + 118\\
\,\,\,\,\,x = 25\\
d)2x - 49 = {5.3^2}\\
\,\,\,\,\,\,2x - 49 = 5.9\\
\,\,\,\,\,2x - 49 = 45\\
\,\,\,\,\,2x = 45 + 49\\
\,\,\,\,\,2x = 94\\
\,\,\,\,\,x = 94:2\\
\,\,\,\,\,x = 47
\end{array}\)