<PRE><B>Question 1110432</B>
the general form for the equation of a line is
:
Ax +By +C = 0, where A, B, C are real numbers, also A or B can be zero, but not both at the same time.
:
therefore, your three lines have the general form
:
x -y +9 = 0
:
x +2y = 0
:
3x +y -25 = 0
:
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