Answer:
[tex]{:}\longrightarrow[/tex][tex]\sf 3x+y=-7 [/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf y=-7-3x [/tex]
[tex]\boxed{\begin{array}{|c|c|c|c|} x & 1 & (-1) & 0 \\ y & -10 & (-4) & -7 \end{array}}[/tex]
Hence the intercepts are
[tex]\therefore[/tex][tex]\sf A (1,-10),B(-1,-4),C(0,-7)[/tex]