in a fish tank 6/7 of the fish have a red stripe on them . if 18 of the fish have red stripes how many total fish are in the tank?

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11-09-2017
Mathematics

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in a fish tank 6/7 of the fish have a red stripe on them . if 18 of the fish have red stripes how many total fish are in the tank?

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jdoe0001 jdoe0001 · Answer 1 · 2017-09-11T00:34:02+02:00

well, if 6/7 is 18, and how many is the 7/7 or a 1 whole(total)?

[tex]\bf \begin{array}{ccll} \stackrel{frational}{amount}&\stackrel{quantity}{amount}\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ \frac{6}{7}&18\\\\ \frac{7}{7}&x \end{array}\implies \cfrac{\frac{6}{7}}{\frac{7}{7}}=\cfrac{18}{x}\implies \cfrac{\frac{6}{7}}{1}=\cfrac{18}{x}\implies \cfrac{6}{7}=\cfrac{18}{x} \\\\\\ x=\cfrac{7\cdot 18}{6}[/tex]