How do I do one of these types of problems?

x = 5

Step-by-step explanation:

I'm assuming the question is asking to solve for variable x.

The two red arrows signify the two lines are congruent, meaning they equal the same measurement.

In other words:

23x - 5 = 21x + 5

Isolate the variable x

Add 5 to both sides to cancel 5 from the left side

23x - 5 + 5 = 21x + 5 + 5

23x + 0 = 21x + 10

23x = 21x + 10

Subtract 21x from both sides to cancel 21x from the right side

23x - 21x = 21x - 21x + 10

2x = 0x + 10

2x = 10

Divide both sides by 2 to isolate the variable x

2x ÷ 2 = 10 ÷ 2

x = 5

When solving for these types of problems, always isolate the variable. Also, keep in mind that whatever you do to one side, you must do to the other (such as how I added 5 to both sides).

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