\[ -3y + 10x - 0.1 = 0 \Rightarrow -3y = -10x + 0.1 \Rightarrow y = \frac{10x - 0.1}{3} \]
\[ 15x + 4\left(\frac{10x - 0.1}{3}\right) = 2.7 \]
\[ 15x + \frac{40x - 0.4}{3} = 2.7 \]
\[ 45x + 40x - 0.4 = 8.1 \]
\[ 85x = 8.5 \]
\[ x = \frac{8.5}{85} = 0.1 \]
\[ y = \frac{10(0.1) - 0.1}{3} = \frac{1 - 0.1}{3} = \frac{0.9}{3} = 0.3 \]
Ответ: \(x = 0.1, y = 0.3\)