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4. Linear Equations in Two Variables
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निम्नलिखित समीकरणों में से प्रत्येक समीकरण के चार हल लिखिए
$\pi x+y=9$
Option A
Option B
Option C
Option D
Solution
When $x=0$, $\pi(0)+y=9$ $\Rightarrow y=9-0$
$\Rightarrow $ $y=9$ $\therefore$ Solution is $(0,\,9)$.
When $x=1$, $\pi(1)+y=9$ $\Rightarrow y=9-\pi $
$\therefore$ Solution is $\{1,(9-\pi)\}$.
When $x=2$, $\pi (2)+y=9$ $\Rightarrow y=9-2\pi $
$\therefore$ Solution is $\{2,(9-2\pi)\}$.
When $x=-\,1,\, \pi(-1)+y=9$ $\Rightarrow-\pi+y=9$
$\Rightarrow $ $y=9+\pi$ $\therefore$ Solution is $\{-1,(9+\pi)\}$.
Standard 9
Mathematics
