An equation is formed of two equal expressions. Luke made a mistake in step 3.
What is an equation?
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
Luke made a mistake in step 3, he needs to cancel (x-4) from the second term of the left side instead of x. Also, (x-4) is needed to be cancelled from the right side. Therefore, step 3 will be,
(x-4) + x = x(x-3)
Hence, Luke made a mistake in step 3.
Learn more about Equation:
https://brainly.com/question/2263981
#SPJ2
