Pair of Linear Equations in Two variables — Maths STD 10 — Question
CBSE BoardEnglish MediumSTD 10MathsPair of Linear Equations in Two variables1 Mark
MCQ
The solution of the equations $x - y = 2$ and $x + y = 4$ is :
✓
$3$ and $1$
B
$4$ and $3$
C
$5$ and $1$
D
$-1$ and $-3$
✓
Answer
Correct option: A.
$3$ and $1$
$x - y = 2, x = 2 + y$ Substituting the value of $x$ in the second equation
we get $2 + y + y = 4$
$2 + 2y = 4$
$2y = 2$
$y = 1$
Now putting the value of $y,$ we get,
$x = 2 + 1 = 3$
The solutions are $x = 3$ and $y = 1$.
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