the sum of the numerator and denominator of a fraction is 12. If the denominator is increased by 3, the fraction becomes 1/2. Find the fraction.
Answers
Answered by
1
let numerator be x
then denominator is 12-x
x/12-x+3=1/2
x/15-x=1/2
15-x=2x(by cross multiplication)
-x=2x+15
-3x=15
x=-5
fraction= -5/17
then denominator is 12-x
x/12-x+3=1/2
x/15-x=1/2
15-x=2x(by cross multiplication)
-x=2x+15
-3x=15
x=-5
fraction= -5/17
aradhana22:
app answer wrong h it's ,5/7 pata ni kese book me aa ra h
Answered by
2
Answer:
I got
5
7
Explanation:
Let call our fraction
x
y
, we know that:
x
+
y
=
12
and
x
y
+
3
=
1
2
from the second:
x
=
1
2
(
y
+
3
)
into the first:
1
2
(
y
+
3
)
+
y
=
12
y
+
3
+
2
y
=
24
3
y
=
21
y
=
21
3
=
7
and so:
x
=
12
−
7
=
5
I got
5
7
Explanation:
Let call our fraction
x
y
, we know that:
x
+
y
=
12
and
x
y
+
3
=
1
2
from the second:
x
=
1
2
(
y
+
3
)
into the first:
1
2
(
y
+
3
)
+
y
=
12
y
+
3
+
2
y
=
24
3
y
=
21
y
=
21
3
=
7
and so:
x
=
12
−
7
=
5
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