Book Maths Puzzle Co-ordinate geometry

What is the equation for a line parallel to the Y axis passing through (2,3)?

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Book Other Question

Tweleve is the least positive integer with six different positive factors. The factors are 1, 2, 3, 4, 6, 12. What is the least positive integer with exactly twenty-four different Can you solve each equation. I have to watch for Extraneous solutions.

1) 5/x+2 + 2/x-3 = x-1/x-3

2) 6/y-2 + 7/y-8 = y-1/y-8

Please help