Sue is two years older than Chris. Jim is 4 years older than Sue. Their ages total 68. How old is Sue?
Hello! Hope this helps :)
You can set up three equations from the given information. Let s=sue, c=chris, j=jim
Sue is two years older than Chris:
Equation 1 s=2+c
Jim is 4 years older than Sue:
Equation 2 j=4+s
Total ages are 68
Equation 3 s+c+j=68
First, solve for s in equation 3:
s = 68-c-j
Solve equation 1 for c:
Now plug in the new equation 1 and equation 2 into the new equation 3:
Plugged in c and j:
Now solve for s:
Sue is 22 years old.
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