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Given intercharges : Signs + and x and numbers 4 and 5.

5 x 4 + 20 = 40
5 x 4 + 20 = 85
5 x 4 + 20 = 104
5 x 4 + 20 = 95

Correct Answer: 5 x 4 + 20 = 104

Explanation:

On interchanging + and x and 4 and 5 in (c),

we get the equation as
4 + 5 x 20 = 104 or 104 = 104, which is true.

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