\[ x + (500 - 387) = 500 \]
\[ x + 113 = 500 \]
\[ x = 500 - 113 \]
\[ x = 387 \]
\[ 3y = 135 + 4507 \]
\[ 3y = 4642 \]
\[ y = \frac{4642}{3} \]
\[ y = 1547 \frac{1}{3} \]
\[ x \cdot 100 = 4500 \]
\[ x = \frac{4500}{100} \]
\[ x = 45 \]
\[ v \cdot 100 - 4500 \]
\[ v \cdot 100 = 4500 \]
\[ v = \frac{4500}{100} \]
\[ v = 45 \]
Ответ: 268. 1) x = 387, 2) y = 1547 1/3; 269. 1) x = 45, 2) v = 45