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4. Linear Equations in Two Variables
easy
Write four solutions for equations : $2x + y = 7$
Option A
Option B
Option C
Option D
Solution
When $x=0$, $2(0)+y=7$ $\Rightarrow 0+y=7$
$\Rightarrow $ $y=7$ $\therefore$ Solution is $(0,\,7)$.
When $x=1$, $2(1)+y=7$ $\Rightarrow y=7-2$
$\Rightarrow $ $y=5$ $\therefore$ Solution is $(1,\,5)$.
When $x=2$, $2(2)+y=7$ $\Rightarrow y=7-4$
$\Rightarrow $ $y=3$ $\therefore$ Solution is $(2,\,3)$.
When $x=3$, $2(3)+y=7$ $\Rightarrow y=7-6$
$\Rightarrow $ $y=1$ $\therefore$ Solution is $(3,\,1)$.
Standard 9
Mathematics