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Byju's Answer
Standard VII
Mathematics
Performing Mathematical Operations on Equation
Which of the ...
Question
Which of the following ordered pairs is represented by the line
7
x
−
5
y
−
5
=
0
.
A
(
6
,
7
)
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B
(
7
,
7
)
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C
(
5
,
6
)
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D
(
8
,
7
)
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Solution
The correct option is
C
(
5
,
6
)
7
x
−
5
y
−
5
=
0
can be re-written as
7
x
−
5
5
=
y
or
7
x
5
−
1
=
y
Hence for integral values of both
x
and
y
,
′
x
′
has to be a multiple of
5
.
The smallest non-zero multiple of
5
is
5
itself.
For
x
=
5
, we get
y
=
7
−
1
=
6
.
Hence,
(
5
,
6
)
satisfies the above equation.
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