Of Maria's total salary, 1/4th goes to taxes and 2/3rds of what remains goes to food, rent, and bills. If she is
left with $500 each month, what is her total monthly salary?
taxes=1/4 wages
FoodRent=2/3(Wages-taxes)
Wages=500+taxes+FoodRent
= 500+1/4 W +2/3 (W-1/4W)
now solve for Wages W