Question 1003357
Three waiters at a local restaurant earned different amounts of money the past week.  Jennifer earned $40 less than twice the amount Tony earned.  Chris earned $60 more than Tony.  How much did each waiter earn if they earned a total of $900.
Choose a variable for Tony: let it be t

Write an expression for Jennifer:

J = 2t-40
Write an expression for Chris:

C = t+60
Write an equation for the total the three waiters earned.  Solve for Tony's earnings.  

t+j+c = 900

t+2t-40+t+60 = 900
4t+20 =900
4t= 880
t = 220

Tony earned: $220