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Cardinality of Sets

A number is i...

Question

A number is increased by $26$ and the new number obtained is divided by $3$ . If the number is $18$ ,find the original number.

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Solution

Let the no. be $x$
A/Q
$\frac{(x + 26)}{3} = 18 \Rightarrow x + 26 = 18 \times 3 = 54 \Rightarrow x = 54 - 26 = 28 \Rightarrow x = 28$

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