Bonjour ! je dois effectuer cet exercice de mathématiques mais je n'y arrive pas vraiment, pourriez-vous m'aider s'il vous plaît ? merci d'avance.

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

Atemperature of 1.64◦f corresponds to answer in units of ◦c.

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