Which expression represents 81 decreased by an unknown number

asked Dec 15, 2017 90.6k views

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1 vote

Hi there!

So, we have to write a expression.

decrease means - and an unknown number is x.

Therefore, the expression is 81-x

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5 votes

unknown number is x decreased by x means minus x means -x 81 decreased by x means 81-x

Ankit Rawat answered Dec 22, 2017

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