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Louie864 Louie864
  • 27-03-2015
  • Mathematics
Answered

I dont understand these problems |×| - 1 < 5 , 3x + 4 <-2, 5x/7 -2=1, 9(2x+3)=10

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konrad509
konrad509 konrad509
  • 27-03-2015

\(|x|-1<5\\ |x|<6\\ x<6 \wedge x>-6\\ x\in(-6,6)\\\\ 3x+4<-2\\ 3x<-6\\x<-2\\\\ \dfrac{5x}{2}-2=1\\ \dfrac{5x}{2}=3\\ 5x=6\\ x=\dfrac{6}{5}\\\\ 9(2x+3)=10\\ 18x+27=10\\ 18x=-17\\ x=-\dfrac{17}{18}\)

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