melonieprince2 melonieprince2

07-12-2017
Mathematics

contestada

Solve the following proportion r/5=9/21

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theHevy theHevy

07-12-2017

Ok, so you use cross-multiplication.
5 × 9 = 21r
45 = 21r
divide both sides by 21
45/21 = r
Simplify
[tex] \frac{15}{7} [/tex] = r
Have a good day!

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