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What will come in the place of the question mark in the following equation? $15 \times ? + 20\%$ of 450 = 360

1. 20
2. 22
3. 24
4. 26

Correct answer: 20

Solution

Compute 20% of 450 = 90. Then the equation becomes 15 × ? + 90 = 360, so 15 × ? = 270. Dividing by 15 gives ? = 20.

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