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  • 11-04-2016
  • Mathematics
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step by step solve this problem -4=r/20-5

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Sanarah
Sanarah Sanarah
  • 11-04-2016

-4 = \(\frac{r}{20}\) - 5
\(\frac{r}{20}\) - 5 = -4 (Switched sides)
(\(\frac{r}{20}\) - 5)20 = (-4)20 (Multiply both sides by 20)
r-100 = -80
r - 100 + 100 = -80 + 100 (Add 100 to each side)
r = 20

Hope this helped :)


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