SOLUTION: right now, susan's age is 4 years more than four times Jane's age. In 20 years, jane will be half of susan's age then. How old are they now?

Question 725879: right now, susan's age is 4 years more than four times Jane's age. In 20 years, jane will be half of susan's age then. How old are they now?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = Jane's age now
Let = Susan's age now
= Jane's age in 20 years
= Susan's age in 20 years
--------------------------------
given:
(1)
(2)
----------------------------
(2)
(2)
(2)
Substitute (1) into (2)
(2)
(2)
(2)
and
(1)
(1)
(1)
Jane is 8 and Susan is 36
check:
(2)
(2)
(2)
(2)
OK

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