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?

Question

Mathematics

Violet Bartlett

19 November, 21:11

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?

+5

Answers (2)

Know the Answer?

Martin · Answer 1

Substitute 5 into each expression and evaluate them.

Step-by-step explanation:

Just took the test

Kaleigh Best · Answer 2

Step-by-step explanation:

There are multiple ways in which you could do this problem.

One would be to carry out the indicated multiplication:

x - 4 - 2x + 4, or - x. Obviously, this equals the given - x.