Answers

2014-11-05T21:01:57+08:00
Let 'x' be the money of Alex
     'y' be the amount that Bob has
     'z' be the money of Carl
since Alex has 50% more money than Bob then you'll have the equation:
x = y + 0.5y
x = 1.50y    ----equation 1
Carl has 25% more money than Bob
z = y + 0.25y
z = 1.25y   ----equation 2
altogether they have 3,750
x + y + z = 3,750  ------equation 3
substitute equations 1 and 2 to equation 3
x + y + z = 3,750
1.5y + y + 1.25y = 3,750
3.75y = 3,750
y = 1,000
substitute y=1,000 to equation 2
z = 1.25y
z = 1.25(1000)
z = 1,250
substitute y=1,000 to equation 1
x = 1.5y
x = 1.5(1000)
x = 1,500
therefore Alex has 1,500 
                 Bob has 1,000
                 Carl has 1,250

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