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Question

A rational number is such that when you multiply it by 52 and add 23 to the product, you get −712. What is the number?

A
23
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B
12
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C
13
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D
25
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Solution

The correct option is B 12
Let the rational number be x.
Now this rational number is multiplied by 52 and the resultant is added to 23.
According to the question, we have
52x+23=712
52x=23712
52x=8712
x=1512×25
x=12

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