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Byju's Answer
Standard X
Mathematics
Componendo and Dividendo
IF 5x + 6y5...
Question
IF
5
x
+
6
y
5
u
+
6
v
=
5
x
−
6
y
5
u
−
6
v
Then prove that x: y = u: v
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Solution
5
x
+
6
y
5
u
+
6
v
=
5
x
−
6
y
5
u
−
6
v
(By alternendo)
5
x
+
6
y
5
x
−
6
y
=
5
u
+
6
v
5
u
−
6
v
5
x
+
6
y
+
5
x
−
6
y
5
x
+
6
y
−
5
y
+
6
y
=
5
u
+
6
v
+
5
u
−
6
v
5
u
+
6
v
−
5
u
+
6
v
(By componendo and dividend)
10
x
/
12
y
=
10
u
/
12
v
Thus
x
/
y
=
u
/
v
⇒
x
:
y
=
u
:
v
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