SOLUTION: * Using charts in Solving Problem Ben is now twice a sold as Robin. Ben's prsent age is ten years greater than Robin's age one year ago. How old is Ben? verbal model, equation,

Algebra ->  Equations -> SOLUTION: * Using charts in Solving Problem Ben is now twice a sold as Robin. Ben's prsent age is ten years greater than Robin's age one year ago. How old is Ben? verbal model, equation,       Log On


   



Question 669061: * Using charts in Solving Problem
Ben is now twice a sold as Robin. Ben's prsent age is ten years greater than Robin's age one year ago. How old is Ben?
verbal model, equation, solve, and check

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +b+ = Ben's age now
Let +r+ = Robin's age now
+r+-+1+ = Robin's age 1 year ago
+r+-+1+%2B+10+ = 10 greater than Robin's age 1 year ago
given:
(1) +b+=+2r+
(2) +b+=+r+-+1+%2B+10+
--------------------
Substitute (1) into (2)
(2) +2r+=+r+-+1+%2B+10+
(2) +r+=+9+
and
(1) +b+=+2r+
(1) +b+=+18+
Ben is 18