\[\boxed{\text{1049.}\text{\ }еуроки - ответы\ на\ пятёрку}\]
\[\textbf{а)}\ x - 6y = 4\]
\[x = 4 + 6y\]
\[если\ y = 0 \Longrightarrow x = 4 + 6 \cdot 0 =\]
\[= 4 \Longrightarrow \ \ (4;0);\]
\[если\ y = 1 \Longrightarrow x = 4 + 6 \cdot 1 =\]
\[= 10 \Longrightarrow (10;1);\]
\[если\ y = \frac{1}{2} \Longrightarrow \ \ x = 4 + 6 \cdot \frac{1}{2} =\]
\[= 4 + 3 = 7 \Longrightarrow \text{\ \ }\left( 7;\frac{1}{2} \right).\]
\[\textbf{б)}\ 3x - y = 10\]
\[- y = 10 - 3x\]
\[y = 3x - 10\]
\[если\ x = 0 \Longrightarrow \ y =\]
\[= - 10 \Longrightarrow (0;\ - 10);\]
\[если\ x = 3 \Longrightarrow y = 3 \cdot 3 - 10 =\]
\[= 9 - 10 = - 1 \Longrightarrow \text{\ \ }(3;\ - 1);\]
\[если\ x = 5 \Longrightarrow \ y = 3 \cdot 5 - 10 =\]
\[= 15 - 10 = 5 \Longrightarrow \text{\ \ }(5;5).\]