Final answer:
The statement x = 17 = x will cause an error because the equal sign (=) should not be used to assign a value to a variable, but to compare two values.
Step-by-step explanation:
The statement that will cause an error is x = 17 = x. In this statement, the equal sign (=) should not be used to assign a value to a variable, but to compare two values. To correctly assign a value to a variable, we use the assignment operator (=) instead.
So, the correct statements would be:
- x = 17;
- x = 42 % 7;
- x = '17';