Система уравнений:
\( 3y = 5 + x \)
\( 4y = 3x + 6 \)
\( 4y = 9y - 15 + 6 \)
\( 4y = 9y - 9 \)
\( 4y - 9y = -9 \)
\( -5y = -9 \)
\( y = \frac{-9}{-5} = \frac{9}{5} \) или \( y = 1.8 \).
\( x = 3y - 5 = 3 \cdot \frac{9}{5} - 5 = \frac{27}{5} - \frac{25}{5} = \frac{2}{5} \) или \( x = 0.4 \).