3 public questions tagged with this topic.
Here's the idea in simple terms: using formula we get 5. Calculation gives this directly, check steps: apply rule, substitute values, simplify to get 5.
Ref: NCERT Mathematics Class XII — Linear Programming
Simply put, complete solution: write formula, plug data, do arithmetic. Final value matches 18. Simple and accurate.
Ref: NCERT Mathematics Class XII — Linear Programming
Look at it this way: complete solution: write formula, plug data, do arithmetic. Final value matches 0, 2. Simple and accurate.
Ref: NCERT Mathematics Class XII — Linear Programming
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