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not real sure :(

can someone walk me through it?

please?

That means:
9 is to (4x - 2) as 12 is to (3x + 2)

Or,
9/ (4x - 2) = 12/ (3x + 2)
Cross multiply and solve for x.

To help you get started,
9(3x + 2) = 12(4x - 2)