Posted by RR on Saturday, March 9, 2013 at 10:25pm.
Onethird of Derick's age two years ago is equal to a quarter of his age four years from now. How old is he now?
Please provide the following:
Representation
Equation
Solution
Answer
Checking

Math  drwls, Saturday, March 9, 2013 at 10:45pm
Let x = Derick's age now.
(x2)/3 = (x+4)/4
Solve for x.
4(x2) = 3(x+4)
x = 12+8 = 20
Two years ago he was 18. 1/3 of that is 6
Four years from now he is 24. 1/4 of that is also 6. 
Math  KALA, Wednesday, December 9, 2015 at 8:17pm
Factorize 2x2square+8x  10=0