Question

Use inverse operations to solve each question.
4.9 + z = -9
z =

Answer 1

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

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.