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Mai thinks Tyler’s answer is incorrect. She says, “If expressions are equivalent then they are equal for any value of the variable. Why don’t you try to substitute the same value for in all the equations and see where they are not equal?” 1. Find the step where Tyler made an error. 2. Explain what he did wrong. 3. Correct Tyler’s work.

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MrRoyal

Mai's statement implies that Tyler's steps do not form an equivalent expression

Tyler's error is in step 3.

How to determine Tyler's error?

Tyler's steps of solving the expression is given as:

  1. 9 - 4 ( 5x - 6 )
  2. 9 + (-4) ( 5x + -6 )
  3. 9 + -20x + -6
  4. 3 - 20x

Tyler's error is in step 3.

This is so because:

9 + (-4) ( 5x + -6 ) in step 2 is not equivalent to 9 + -20x + -6 in step 3

In actual sense, Tyler's error is in multiplying the (-4) and (-6)

The correct solution is as follows:

  1. 9 - 4 ( 5x - 6 )
  2. 9 + (-4) ( 5x + -6 )
  3. 9 + -20x +24
  4. 33 - 20x

Read more about equivalent expressions at:

https://brainly.com/question/2972832

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