Answer:
For the first one just multiply all of the three numbers
and the second is the same, just multiply and you'll get your answer.
Step-by-step explanation:
Answer:
The step 4 is not what he should have done. But the wrong is step 5, because if he added -2x both sides, it would give the following equation:

and not 
Note that in step 4 he should have added 2x and not -2x to both sides, but we still have the equality. The problem is that step 5 is totally wrong.
I don't know what answer is expected to this question, but I would mark step 5, because this is mathematically wrong.
Solving the equation

Using distribution

Add
both sides


Add 12 both sides

Divide both sides by 5

Answer:
Hope this will help you......
Answer:
5 feet
Step-by-step explanation:
i know it is, i'm a straight A student in math :D
i just don't know how to explain-