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Model Paper 5 — Maths STD 11 Science — Question

CBSE BoardEnglish MediumSTD 11 ScienceMathsModel Paper 51 Mark
MCQ
Solve: $3 x+5< x-7$, when $x$ is a real number
  • A
    $x>-12$
  • B
    $x<-12$
  • ✓
    $x<-6$
  • D
    $x>-6$
✓

Answer

Correct option: C.
$x<-6$
$3 x+5$
$\Rightarrow 3 x+5-x$
$\Rightarrow 2 x+5<-7$
$\Rightarrow 2 x+5-5<-7-5$
$\Rightarrow 2 x<-12$
$\Rightarrow \frac{2 x}{2}<-\frac{12}{2}$
$\Rightarrow x<-6$

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