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2 votes
Which expression represents 81 decreased by an unknown number?

81÷a

81a

81−a

81 + a

User Gibson
by
6.6k points

1 Answer

2 votes

Answer:

81 - a

Explanation:

Decreased

means to subtract

81 –

by an unknown number

means a variable such as a or x

therefor

81 – a

User Chebyr
by
6.5k points
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