to verify that 1/5 (5x-20) - 1/2 (4x-8) is equivalent to - x. Which procedure can I follow to determine if the two expressions are equivalent? Add the two expressions, put an equal sign between the two expressions and solve for x, substitute 5 into the first expression, substitute 4 into the second expression, and evaluate the, OR substitute 5 into each expression and evaluate them?
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Home » Mathematics » to verify that 1/5 (5x-20) - 1/2 (4x-8) is equivalent to - x. Which procedure can I follow to determine if the two expressions are equivalent?