4. Linear Equations in Two Variables
easy

સુરેખ સમીકરણ $2x + cy = 8$ માં $c$ ની કઈ કિંમત માટે $x$ અને $y$ નો ઉકેલ સમાન મળે ? 

Option A
Option B
Option C
Option D

Solution

The value of $c$ for which the linear equation $2 x+c y=8$ has equal values of $x$ and $y$

i.e., $\quad x=y$ for its solution is

$2 x+c y=8 \Rightarrow 2 x+c x=8 \quad[\because y=x]$

$\Rightarrow c x=8-2 x$

$\therefore c=\frac{8-2 x}{x}, x \neq 0$

Standard 9
Mathematics

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