\[\boxed{\text{871\ (871).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ y = \frac{2}{3}x - 4\]
\[y = \frac{2}{3} \cdot 0 - 4 = - 4,\ \ (0;\ - 4)\]
\[\frac{2}{3}x - 4 = 0\]
\[\frac{2}{3}x = 4\]
\[x = \frac{4 \cdot 3}{2} = 6,\ \ (6;0)\]
\[Ответ:(0;\ - 4);\ \ (6;0).\]
\[2)\ y = 7 - 3x\]
\[y = 7 - 3 \cdot 0 = 7,\ \ (0;7)\]
\[7 - 3x = 0\]
\[3x = 7\]
\[x = \frac{7}{3} = 2\frac{1}{3},\ \ \left( 2\frac{1}{3};0 \right)\]
\[Ответ:(0;7),\ \left( 2\frac{1}{3};0 \right).\]