Asked by favour

twice a certain number is subtracted from 9 times the number. the results is 21. find the number
















































Answers

Answered by favour
i need help in answering this question for me and show working
Answered by oobleck
twice a certain number ... 2x
9 times the number ... 9x
is subtracted ... 9x-2x = 7x
now finish it off
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