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Mathematics
Mathematics
Problem
In
△
D
E
F
\triangle DEF
△
D
E
F
,
D
E
=
D
F
DE = DF
D
E
=
D
F
. If
∠
E
=
(
3
x
+
10
)
∘
\angle E = (3x + 10)^\circ
∠
E
=
(
3
x
+
10
)
∘
and
∠
F
=
(
5
x
−
26
)
∘
\angle F = (5x - 26)^\circ
∠
F
=
(
5
x
−
26
)
∘
, find the value of
x
x
x
. a)
20
20
20
b)
17
17
17
c)
18
18
18
d)
12
12
12
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