C. 9
ExplanationStep 1: Distance from yz-plane is |x|. Step 2: x = -9 so distance is 9. Step 3: Distance is always positive.
Step 1: yz-plane से दूरी |x| होती है। Step 2: x = -9 है इसलिए दूरी 9 है। Step 3: Distance हमेशा positive होती है।
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