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Byju's Answer
Standard IX
Mathematics
Solution of Linear Equation in 2 Variables
i 2 x-y=5 ; 3...
Question
(i) 2x − y = 5; 3x + 2y = 11
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Solution
2
x
-
y
=
5
⇒
y
=
2
x
-
5
.
.
.
(
i
)
3
x
+
2
y
=
11
.
.
.
(
ii
)
Substituting
eq
(
i
)
in
eq
(
ii
)
,
we
get
:
3
x
+
2
2
x
-
5
=
11
⇒
3
x
+
4
x
-
10
=
11
⇒
7
x
=
21
⇒
x
=
3
Substituting
x
=
3
in
eq
(
i
)
,
we
get
:
y
=
2
×
3
-
5
∴
y
=
1
Hence
,
x
=
3
,
y
=
1
is
the
solution
of
the
given
equations
.
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1
Similar questions
Q.
Solve the following simultaneous equations.
(i) 2x + y = 5 ; 3x
-
y = 5
(ii) x
-
2 y =
-
1 ; 2x
-
y = 7
(iii) x + y = 11 ; 2x
-
3 y = 7
(iv) 2x + y =
-
2 ; 3x
-
y = 7
(v) 2x
-
y = 5 ; 3x + 2y = 11
(vi) x
-
2y =
-
2 ; x + 2y = 10
Q.
Solve:
x
−
y
=
5
;
3
x
+
2
y
=
25
Q.
If
2
x
+
y
=
5
;
3
x
−
y
=
5
, then find
x
Q.
Solve the following sets of simultaneous equations.
2
x
+
y
=
5
;
3
x
−
y
=
5
Q.
Solve the following sets of simultaneous equations.
(i) x + y = 4 ; 2x
-
5y = 1
(ii)
2x + y = 5; 3x
-
y = 5
(iii)
3x
-
5y =16; x
-
3y = 8
(iv)
2y
-
x =0; 10x + 15y = 105
(v)
2x + 3y + 4 = 0; x
-
5y = 11
(vi)
2x
-
7y = 7; 3x + y = 22
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