Answer:
2x - y - 12 = 0
Step-by-step explanation:
the equation of a line in standard form is
Ax + By + C = 0 ( A is a positive integer and B, C are integers )
given
2x - 9 = y + 3 ( subtract y + 3 from both sides )
2x - y - 12 = 0 ← in standard form
