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the product of a number and 9, increased by 4, is 58. find the number

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2 Answers

You have an English language sentence that we need to translate into Mathematics language.

English)  (the product of a number and 9), (increased by 4), (is 58)
 
Math)     (Number x 9), (+ 4), (= 58) 
I put in the () to show you what parts go together
Call the Number N, we can use anything (x,s, ...) but N makes sense
 
(N x 9) + 4 = 58
 
Can you do the rest?  subtract 4 from both sides, divide both sides my 9, there is the answer

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