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Secondary 1 | Maths
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Date Posted: 4 years ago
Views: 177
numerator = x
Denominator = x + 4
Original fraction = x/(x + 4)
New fraction
= (x + 3)/(x + 4 + 3) = 4/5
(x + 3)/(x + 7) = 4/5
(this is your desired equation)
Cross multiply,
5 (x + 3) = 4 (x + 7)
5x + 15 = 4x + 28
x = 28 - 15
x = 13
So x + 4 = 17
Original fraction is 13/17
Denominator = x + 4
Original fraction = x/(x + 4)
New fraction
= (x + 3)/(x + 4 + 3) = 4/5
(x + 3)/(x + 7) = 4/5
(this is your desired equation)
Cross multiply,
5 (x + 3) = 4 (x + 7)
5x + 15 = 4x + 28
x = 28 - 15
x = 13
So x + 4 = 17
Original fraction is 13/17
See 1 Answer
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Hope this helps
Date Posted:
4 years ago
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