\[ 265 - y = 540 : 9 \]
\[ 265 - y = 60 \]
\[ y = 265 - 60 \]
\[ y = 205 \]
\[ x + 91 = 1600 : 8 \]
\[ x + 91 = 200 \]
\[ x = 200 - 91 \]
\[ x = 109 \]
\[ a \times 45 = 150 \times 3 \]
\[ a \times 45 = 450 \]
\[ a = 450 : 45 \]
\[ a = 10 \]
\[ 205 + 109 - 10 = 314 - 10 = 304 \]
Ответ: 304