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Answer:

x = -4

General Formulas and Concepts:

Pre-Algebra

  • Order of Operations: BPEMDAS
  • Equality Properties

Step-by-step explanation:

Step 1: Define equation

x + 13 = 9

Step 2: Solve for x

  1. Subtract 13 on both sides:                    x = -4

Step 3: Check

Plug in x into the original equation to verify it's a solution.

  1. Substitute in x:                    -4 + 13 = 9
  2. Add:                                     9 = 9

Here we see that 9 does indeed equal 9.

∴ x = -4 is a solution of the equation.

Answer:

x=-4

Step-by-step explanation:

So when solving a one-step algebraic equation you need to remember what you do to one side you have to do to the other side. In the problem x + 13 = 9 you need to subtract 13 from both sides to isolate x. So your problem should look like x = 9 - 13. Now all you have to do is solve 9 - 13 which is -4. So x = -4.

I hope this helped.

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