posted by Jannie on .
When the numerator and denominator of a fraction are each increased by 5, the
value of the fraction becomes 3/5
When the numerator and denominator of that same
fraction are each decreased by 5, the fraction is then 1/5
Find the original fraction.
(Hint: Let the fraction be p/q) Write in simultaneous equations
(p+5)/(q+5) = 3/5 or
5p + 25 = 3q + 15
5p - 3q = -10
(p-5)/(q-5) = 1/5 or
5p - 25 = q - 5
5p - q = 20
solve the two equations by adding them
help me in math trish
The denominator of a rational number is greater than the numerator by 4. If the numerator is increased by 2 and the denominator is decreased by 1, the number becomes 7/8. Find the original rational number.