Which of the following are not valid assignment statements. a. total = 9; b. 72 = amount; c. profit = 129d. letter = 'w';

b. 72 = amount; is not valid

Step-by-step explanation:

The variable that receives the value(s) must always be on the left side of the equal sign.

It is a convention that makes the sentence more readable and easier to understand. For example, option "a" (total = 9) would be read as: "take variable called 'total' and make its value equal to 9".

practice. practice. practice.