Linear Equations
> Question
SA
3 marks
Year: 2020
Easy
CBSE Class 10
linear-equations
solving
Question
If
2
x
+
y
=
23
and
4
x
−
y
=
19
, find the value of
(
5
y
−
2
x
)
and
(
x
y
−
2
)
.
Solution
1
2
x
+
y
=
23
,
4
x
−
y
=
19
. Solving, we get
x
=
7
,
y
=
9
+1 mark
2
5
y
−
2
x
=
45
−
14
=
31
+1 mark
3
x
y
−
2
=
7
9
−
2
=
7
−
5
+1 mark
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