4. Linear Equations in Two Variables
medium

दो चरों वाले निम्नलिखित रैखिक समीकरणों में से प्रत्येक का आलेख खींचिए

$x+y=4$

Option A
Option B
Option C
Option D

Solution

$x+y =4$            $ \Rightarrow y=4-x$

If we have           $x=0,$ then $y=4-0=4$

                           $x=1,$ then $y=4-1=3$

                           $x=2,$ then $y=4-2=2$

$\therefore$ We get the following table :

$x$ $0$ $1$ $2$
$y$ $4$ $3$

$2$

Plot the ordered pairs $(0,\,4)$, $(1,\,3)$ and $(2,\,2)$ on the graph paper. Joining these poltils, we get a line $AB$ as shown below.

Thils the line $A B$ is the required graph of $x+y=4$.

Standard 9
Mathematics

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