SOLUTION: leah is twice her sister age decreased by 4.the two ages together add up to 89.find leah`s age.

Algebra ->  Equations -> SOLUTION: leah is twice her sister age decreased by 4.the two ages together add up to 89.find leah`s age.      Log On


   

Question 260350: leah is twice her sister age decreased by 4.the two ages together add up to 89.find leah`s age.
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
eah is twice her sister age decreased by 4
translates to
(i) L = 2S - 4
the two ages together add up to 89
translates to
(ii) L + S = 89
by substitution, we get
(iii) 2S-4 + S + 89
3S - 4 = 89
3S = 93
S = 31
L = 58