The one which is not part of the solution is option D. Using the commutative property.
<h3>What is a system of equations?</h3>
A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.
Given;
5(2x-8)= 20
By Using the distributive property
10x-40-20 = 0
Combining like terms
10x-40+40-20 + 40 = 0
Dividing both sides by 10 to isolate the variable
10x = 60
x = 6
Thus, we can see that all the options are included except option D.
So, the one which is not part of the solution is option D. Using the commutative property.
Learn more about equations here;
brainly.com/question/10413253
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