Let's change Jeff to Geoff so we have salaries
![w, j, m, f, g](https://img.qammunity.org/2019/formulas/mathematics/high-school/4f91qtwxpx1dcxhafd9uzvffmaeqrcfl4g.png)
Translating into symbols, ignoring the irrelevant work histories,
f=3g
m=50000
j=60000
w=2m
g= (3/4) m
Solve for f
j seems unconnected and we can ignore w too.
f=3g = 3(3/4) m = 3(3/4) (50000) = 112500
Frank's salary is
Answer: $112,500