1
You visited us
1
times! Enjoying our articles?
Unlock Full Access!
Byju's Answer
Standard IX
Mathematics
Addition of Polynomials
iii 9 x+11 y=...
Question
(iii) 9x + 11y = 78; 11x + 9y = 82
Open in App
Solution
9
x
+
11
y
=
78
.
.
.
.
(
i
)
11
x
+
9
y
=
82
.
.
.
.
(
ii
)
Adding
eq
(
i
)
and
(
ii
)
,
we get
:
9
x
+
11
y
=
78
+
11
x
+
9
y
=
82
20
x
+
20
y
=
160
∴
20
x
+
y
=
160
⇒
x
+
y
=
8
Subtracting
eq
(
ii
)
from
(
i
)
,
we get
:
9
x
+
11
y
=
78
11
x
+
9
y
=
82
-
-
-
-
2
x
+
2
y
=
-
4
∴
-
2
x
-
y
=
-
4
⇒
x
-
y
=
2
∴
x
+
y
=
8
,
x
-
y
=
2
Suggest Corrections
0
Similar questions
Q.
Find the values of
(
x
+
y
)
and
(
x
−
y
)
without actually solving for
x
and
y
.
9
x
+
11
y
=
78
;
11
x
+
9
y
=
82
Q.
If the adjacent sides of a parallelogram are represented by
2
x
2
−
5
x
y
+
3
y
2
=
0
and the equation of one diagonal is
x
+
y
−
2
=
0
,
then the equation of the other diagonal is
Q.
(–6, 0), (0, 6) and (–7, 7) are the vertices of a
Δ
ABC. The incircle of the triangle has the equation
Q.
The equation of the normal to the hyperbola
x
2
−
9
y
2
=
7
at the point (4,1) is
.
