If 1 is added in numerator and denominator then a fraction changes to 4. If 1 is subtracted from the numerator and denominator, fraction changes to 7. Numerator of the fraction is:
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Answer:
Explanation:
Let
x
y
represent the fraction
The problem specifies
(
a
)
Adding
1
to the numerator and denominator makes the fraction equal to
1
2
(
b
)
Subtracting
1
from the top and bottom makes the fraction equal to
1
3
(
a
)
x
+
1
y
+
1
=
1
2
(
b
)
x
−
1
y
−
1
=
1
3
...
...
...
...
...
...
...
...
―――――――
Solve for
x
, already defined as "the numerator of the original equation"
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Step-by-step explanation:
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