Question

Barb solved the following equation: 4(3x – 12) = 5(2x + 6) Step Work Justification 1 12x – 48 = 10x + 30 2 2x – 48 = 30 3 2x = 78 4 x = 39 Which of the following has all correct justifications Barb used to solve this equation?

Answer 1

Answer:

The answer is 1. Distributive property. 2. Subtraction property of equality. 3. Addition property of equality. 4. Division property of equality. So basically A

Step-by-step explanation:

You begin to distribute the parenthesis. Then you subtract the like terms. Then add to a negative to cancel it out. Then you divide and get your answer. I had to explain my reasoning but also for extra proof that this is the answer.

I took the test and got this question right. Hope this helped : )