A solution to a equation is when the variable is substituted fully. That makes the equation true.
Answer:
x < -7 or x > 13
Step-by-step explanation:
3 - x < -10 or 3 - x > 10
-x < -13 or -x > 7
x > 13 or x < -7
Answer: x < -7 or x > 13
<h2>Solving for the Distance between two Points</h2><h3>
Answer:</h3>
or 
<h3>
Step-by-step explanation:</h3>
<em>Please refer to my answer from this Question to know more about distances between two points: <u>brainly.com/question/24629826</u></em>
Given:


Solving for the Distance:

<u>Note:</u>

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
