JAMB - Mathematics (1999 - No. 11)
The sum of two numbers is twice their difference. If the difference of the numbers is P, find the larger of the two numbers
p/2
3p/2
5p/2
3p
説明
Let the numbers be x and y
x+y = 2p.....(i)
x-y = p......(ii)
2x = 3p
x = 3p/2
x+y = 2p.....(i)
x-y = p......(ii)
2x = 3p
x = 3p/2