Problem:	To solve this problem...
Evaluate for x = 4, z = 2 (x - z) / 2 =	The parentheses mean for you to do the things inside them first. Then do the divide. Do the stuff inside the parentheses first. See the notes on expressions for help on evaluating expressions.

Enter your answer:
Your answer may be in any of the following forms:

• Integer (positive,negative,zero)
• Decimal (must be accurate to 4 places)
• Fraction (e.g., '3/4')
• Mixed number (e.g., '4 3/4')
• Scientific notation (e.g., '1.2e-02')
• Single words, correctly spelled (e.g.,'isosceles')