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Formation of Algebraic Expressions

If 7 is add...

Question

If $7$ is added to five times a number, the result is $57$ . Find the number.

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Solution

Let the number be x.
$= 7 + 5 x = 57$
$= 5 x = 57 - 7$
$= 5 x = 50$
$= x = 50 / 5$
$= 10.$

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