Answer:
A: 3
B: 1
C: 5
D: 6
E: 4
F: 2
Step-by-step explanation:
A: The arrows should be a giveaway; you're distributing the 3 into the parentheses.
B: Step shows adding 12, and only one of those properties has anything to do with addition, the addition property of equality. The property basically says that if we already know that 6x - 12 is equal to 18, then if we add any number to both sides (given that the same number is added to both sides), the two sides will still be equal. The other properties, for subtraction, multiplication, and division work the same way except with a different operation.
C: Step shows multiplying both sides by 2, so it's the multiplication property of equality.
D: Step shows subtracting both sides by -6x, so it's the subtraction property of equality.
E: Step shows dividing both sides by 6, so it's the division property of equality.
F: Step shows combining two terms that both have x as a variable, so it's combine like terms.
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