The graphs of $2y + x + 3 = 0$  and $3y + ax + 2 = 0$ are perpendicular. Solve for $a.$
Question:
The graphs of $2y + x + 3 = 0$  and $3y + ax + 2 = 0$ are perpendicular. Solve for $a.$
Answer:
Let's think step by step.

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The graphs of $2y + x + 3 = 0$  and $3y + ax + 2 = 0$ are perpendicular. Solve for $a.$
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