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Question
By how much does I exceed 2x − 3y − 4?
Options
2x − 3y − 5
2x − 3y − 3
5 − 2x + 3y
none of these
Solution
5 − 2x + 3y
1 exceeds 2x − 3y − 4.
∴1 − (2x − 3y − 4) = 1 − 2x + 3y + 4
= 5 − 2x + 3y
∴ 1 exceeds 2x − 3y − 4 by 5 − 2x + 3y.
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