Which two numbers should be interchanged to make the given equation correct?
9 + 7 × 5 - 18 ÷ 2 = 3 × 4 - 10 + 45 ÷ 5
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 7 and 4
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Given equation: 9 + 7 × 5 - 18 ÷ 2 = 3 × 4 - 10 + 45 ÷ 5 Let us see all the options: |
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1. 7 and 4 9 + 4 × 5 - 18 ÷ 2 = 3 × 7 - 10 + 45 ÷ 5 LHS = 9 + 20 - 9 = 20 RHS = 21 - 10 + 9 = 20 Hence, LHS is equal to RHS |
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2. 18 and 45 9 + 7 × 5 - 45 ÷ 2 = 3 × 4 - 10 + 18 ÷ 5 LHS = 9 + 35 - 22.5 = 21.5 RHS = 12 - 10 + 3.6 = 5.6 LHS is not equal to RHS |
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3. 2 and 5 9 + 7 × 2 - 18 ÷ 2 = 3 × 4 - 10 + 45 ÷ 2 LHS = 9 + 14 - 9 = 14 RHS = 12 - 10 + 22.5 = 24.5 LHS is not equal to RHS |
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4. 9 and 3 3 + 7 × 5 - 18 ÷ 2 = 9 × 4 - 10 + 45 ÷ 5 LHS = 3 + 35 - 9 = 29 RHS = 36 - 10 + 9 = 35 LHS is not equal to RHS |