3(x + 4) = 18 (given)
3x + 12 = 18 (distributive property)
3x = 6 (subtraction)
x = 2
give a reason for the last step in the argument shown.
a)
addition
b)
division
c)
subtraction
d)
multiplication

The correct answer is B) division.

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

3(x + 4) = 18 (Given)  

3x + 12 = 18 (Distributive Property)  

3x = 6 (Subtraction)  

x = 2

To obtain the result, in the last step we have to divide both sides by 3.

Mathematically speaking:

3x÷3 = 6÷3

x =2

So, the correct answer is B) division.

Feel free to ask for more if it´s necessary or if you did not understand something.

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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