SOLUTION: if jims age is added to sandras age, the sum is 18. if twice jims age is subtracted from sandras age, the difference is 3. how old is each?

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: if jims age is added to sandras age, the sum is 18. if twice jims age is subtracted from sandras age, the difference is 3. how old is each?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 659267: if jims age is added to sandras age, the sum is 18. if twice jims age is subtracted from sandras age, the difference is 3. how old is each?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
if jims age is added to sandras age, the sum is 18. if twice jims age is subtracted from sandras age, the difference is 3. how old is each?
-----
Equations:
j + s = 18
s - 2j = 3
-------
Substitute for "s" and solve for "j":
18-j - 2j = 3
-3j = -15
j = 5 yrs old (jim's age now)
------
Solve for "s":s = 18-j
s = 13 yrs old (Sandra's age now)
==========================
Cheers,
Stan H.