david3387 david3387
  • 23-10-2018
  • Mathematics
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solve this inequality for x 81 -1 1/5r <55

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gmany
gmany gmany
  • 24-10-2018

[tex]81-1\dfrac{1}{5}r < 55\qquad|\text{subtract 81 from both sides}\\\\-\dfrac{1\cdot5+1}{5}r < -26\qquad|\text{change the signs}\\\\\dfrac{6}{5}r > 26\qquad|\text{multiply both sides by 5}\\\\6r > 130\qquad|\text{divide both sides by 6}\\\\r > \dfrac{130}{6}\\\\r > \dfrac{65}{3}\to r > 21\dfrac{2}{3}[/tex]

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