4. Linear Equations in Two Variables
easy

નીચેના સમીકરણના ચાર ઉકેલ લખો  : $2x + y = 7$

Option A
Option B
Option C
Option D

Solution

જો $x=0$ હોય, તો  $2x+y=7$

$\therefore 2(0)+y=7$

$\therefore 0+y=7$

$\therefore y=7$

આમ, $x=0$ હોય, તો $y=7$ $\therefore$ ઉકેલ $(0,\,7)$

જો $x=1$ હોય, તો  $2x+y=7$

$\therefore 2(1)+y=7$

$\therefore 2+y=7$

$\therefore y=7-2$

$\therefore y=5$

આમ, $x=1$ હોય, તો $y=5$ $\therefore$ ઉકેલ $(1,\,5)$

જો $x=2$ હોય, તો  $2x+y=7$

$\therefore 2(2)+y=7$

$\therefore 4+y=7$

$\therefore y=7-4$

$\therefore y=3$

આમ, $x=2$ હોય, તો $y=3$ $\therefore$ ઉકેલ $(2,\,3)$

જો $x=3$ હોય, તો  $2x+y=7$

$\therefore 2(3)+y=7$

$\therefore 6+y=7$

$\therefore y=7-6$

$\therefore y=1$

આમ, $x=1$ હોય, તો $y=1$ $\therefore$ ઉકેલ $(3,\,1)$

Standard 9
Mathematics

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