Posted by Sue on Monday, November 26, 2012 at 8:53am.
I need the algebra sentence for the following problem..Adam is 3 times as old as Cynthia and Fred is 16 years younger than Adam. One year ago, Adam's age was twice the sum of Cynthia's and Fred's age.Find their present age.

algebra  kay, Monday, November 26, 2012 at 10:46am
Let Adam=x, Cynthia=y and Fred=z
We have: x=3y, z=x16 , x1=2(y1+z1)
so x=3y, x=z+16 and x=2y+2z3
3y=z+16 so z=3y16
Also,
3y=2y+2z3 so y=2z3 = 2(3y16)3=6y35 so 5y=35 and y=7, z=3(7)16=5 and x=3(7)=21
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