Linear Equations in Two Variables — Maths STD 9 — Question
Gujarat BoardEnglish MediumSTD 9MathsLinear Equations in Two Variables2 Marks
Question
Write four solutions of the equation: $\pi x + y = 9$
✓
Answer
$\pi x + y = 9$
$⇒ y = 9 – \pi x$
Put $x=0$, we get $y =9-\pi(0)=9-0=9$
put $x=1$, we get $y =9-\pi(1)=9-\pi$
Put $x=-1$, we get $y =9-\pi(-1)=9+\pi$
Put $x=\frac{9}{\pi}$, we get $y=9-\pi\left(\frac{9}{\pi}\right)=9-9=0$
$\therefore$ Four solutions are $(0,9),(1,9-\pi),(-1,9+\pi)$ and $\left(\frac{9}{\pi}, 0\right)$.
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