Question

Solve for z: -21 = z - (-6 - 2z)

Answer 1

Answer:

z = -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

Algebra I

• Terms/Coefficients/Degrees

Step-by-step explanation:

Step 1: Define

-21 = z - (-6 - 2z)

Step 2: Solve for z

1. Distribute negative:                      -21 = z + 6 + 2z
2. Combine like terms:                     -21 = 3z + 6
3. Isolate z term:                               -27 = 3z
4. Isolate z:                                        -9 = z
5. Rewrite:                                         z = -9

Answer 2

Answer:

Step-by-step explanation

-21-6=2z+z

Or,-27=3z

Or,z=-9