anonymous
  • anonymous
Can you help me solve this problem,and Explain it to me (: -2/5x - 9 < 9/10
Mathematics
schrodinger
  • schrodinger
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ajprincess
  • ajprincess
Is this ur question? \[-\frac{ 2 }{ 5 }x-9<\frac{ 9 }{ 10}\]
anonymous
  • anonymous
Yes :)
jiteshmeghwal9
  • jiteshmeghwal9
\[\frac{-2(x)}{5}-9<\frac{9}{10}\]

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jiteshmeghwal9
  • jiteshmeghwal9
\[{-2x-45\over5}<\frac{9}{10}\]
jiteshmeghwal9
  • jiteshmeghwal9
\[10(-2x-45)<9(5)\]
jiteshmeghwal9
  • jiteshmeghwal9
\[-20x-450<45\]
jiteshmeghwal9
  • jiteshmeghwal9
Now add 450 both sides & then divide -20 both sides :)
ajprincess
  • ajprincess
Nw to solve this inequality u hav to isolate x. To do that plz perform the following steps. 1.Add 9 to both sides. 2.Multiply both sides by 5. 3.Divide by -2 both sides. When u divide by a negative number the inequality sign flips. see if u can do it:)
jiteshmeghwal9
  • jiteshmeghwal9
The last point of @ajprincess is very correct in inequality if we divide a negative number the inequality sign flips :)
anonymous
  • anonymous
x > -99/4 ?
ajprincess
  • ajprincess
yup perfect:)
anonymous
  • anonymous
:D yay! Thanks :)
ajprincess
  • ajprincess
welcome:) nd gud work:)

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