Respuesta :

Space

Answer:

z = -13.9

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

Step-by-step explanation:

Step 1: Define equation

4.9 + z = -9

Step 2: Solve for z

  1. Subtract 4.9 on both sides:                    z = -13.9

Step 3: Check

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

  1. Substitute in z:                    4.9 - 13.9 = -9
  2. Subtract:                              -9 = -9

Here we see that -9 does indeed equal -9.

∴ z = -13.9 is a solution of the equation.

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