15 more than twice a number is -23?

1 Answer
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Apr 12, 2018

The number is #-19#

Explanation:

The number can be represented by #n#
Twice the number can be represented by #2n#
15 more than twice the number can be represented by #2n+15#

#2n+15=-23#

Subtract 15 from both sides

#2n=-38#

Divide both sides by 2

#n=-19#

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