Mathematics, 21.04.2020 19:54 faithrawlins14
Nigel makes the claim that x=6 is the solution to the equation 4(5xβ12)β7x=5x. His work to support his claim follows.
Given: 4(5xβ12)β7x=5x
Step 1: 20xβ48β7x=5x
Step 2: 20xβ7xβ48=5x
Step 3: 13xβ48=5x
Step 4: 13xβ13xβ48=5xβ13x
Step 5: 0β48=β8x
Step 6: 6=x
Which of the following justifications can be used to justify and support Nigel's work?
Select all justifications that are correct.
Step 2 is justified by the Commutative Property.
Step 1 is justified by the Distributive Property.
Step 5 is justified by the Property of Additive Inverses.
Step 6 is justified by the Associative Property.
Step 4 is justified by the Symmetric Property.
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