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15-02-2017
Mathematics

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The product of 13 and the difference between a number and 7 yields 2 times the number plus 3

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Dinquisitor Dinquisitor

19-02-2017

the unknown number is ⁹⁷/₁₁

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apologiabiology apologiabiology

19-02-2017

13(n-7)=2n+3
expand
13n-91=2n+3
minus 2n both sides
11n-91=3
add 91 both sides
11n=94
divide both sides by 11
n=94/11

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