Wait â correct: if \( x = 2 \), \( y = -8 \), \( x - y = 2 - (-8) = 10
["How to Correctly Evaluate ( x - y ) When ( x = 2 ) and ( y = -8 )", "When solving expressions involving variables, accurate substitution is key to getting the correct result. Take, for example, the expression ( x - y ) where ( x = 2 ) and ( y = -8 ). A common mistake is handling the subtraction of a negative number incorrectly. In this case, evaluating ( x - y ) with ( y = -8 ) requires careful attention:", "Given:\n( x = 2 )\n( y = -8 )", "To compute ( x - y ):\n[\nx - y = 2 - (-8)\n]", "Remember, subtracting a negative number is the same as adding its absolute value:\n[\n2 - (-8) = 2 + 8 = 10\n]", "Therefore, ( x - y = 10 ), not an incorrect intermediate result. This simple but crucial step ensures accurate calculation and prevents arithmetic errors—essential when working with mathematical expressions in algebra, problem-solving, or test preparation.", "In summary, always apply the correct sign rules when evaluating expressions involving subtraction and negatives. When ( x = 2 ) and ( y = -8 ), ( x - y = 10 ) is precisely correct, reflecting proper mathematical reasoning."]
