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Byju's Answer
Standard X
Mathematics
Equations Reducible to a Pair of Linear Equations in Two Variables
the angles of...
Question
the angles of a triangle are x,y and 40 degree. The difference between the two angles x and y is 30 degree. Find x and y
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Solution
The
sum
of
all
the
three
angles
of
a
triangle
are
180
Degree
.
and
x
,
y
and
40
degree
are
three
angles
of
a
triangle
.
x
+
y
+
40
=
180
x
+
y
=
180
-
40
x
+
y
=
140
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Equation
(
1
)
The
difference
between
the
two
angles
x
and
y
is
given
as
30
degree
.
x
-
y
=
30
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Equation
(
2
)
On
adding
equation
(
1
)
and
equation
(
2
)
,
x
+
y
+
x
-
y
=
140
+
30
2
x
=
170
x
=
170
2
=
85
degrees
and
y
=
140
-
x
=
140
-
85
=
55
degrees
x
=
85
degrees
and
y
=
55
degrees
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