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Asked by AYENI EMMANUEL

TWICE A CERTAIN NUMBER IS SUBTRACTED FROM 9 TIME THE NUMBER.THE RESULT IS 21.FIND THE NUMBER.
9 years ago

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Answered by DAS
let the no. is x
then 9x-2x=21
=>7x=21
=>x=3
9 years ago
Answered by Anonymous
show full working
4 years ago
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TWICE A CERTAIN NUMBER IS SUBTRACTED FROM 9 TIME THE NUMBER.THE RESULT IS 21.FIND THE NUMBER.

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