Final answer:
To find out how much Sue's weekly pay exceeded what she would have made with minimum wage, we can subtract her weekly pay from the weekly pay with minimum wage. The excess pay is $156.
Step-by-step explanation:
To calculate how much Sue's weekly pay exceeded what she would have made with minimum wage, we need to first find out how much she would have made with minimum wage. If minimum wage is $x per hour, then her weekly pay with minimum wage would be 21x.
Given that she made $156 in tips, we can set up the following equation: weekly pay with minimum wage + $156 = Sue's weekly pay.
Solving for Sue's weekly pay, we get: Sue's weekly pay = 21x + $156.
To calculate how much her weekly pay exceeded what she would have made with minimum wage, we subtract Sue's weekly pay from the weekly pay with minimum wage:
Excess pay = (21x + $156) - 21x = $156.