Question

I need to solve for x

Answer 1

Answer:

mAB = 7

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

Set up equation.

mAB + mBC = mAC

x + 4 + 4 = 3x + 2

Step 2: Solve for x

1. Combine like terms:                     x + 8 = 3x + 2
2. Isolate x terms:                             8 = 2x + 2
3. Isolate x term:                               6 = 2x
4. Isolate x:                                        3 = x
5. Rewrite:                                         x = 3

Step 3: Find AB

1. Define:                              mAB = x + 4
2. Substitute in x:                 mAB = 3 + 4
3. Add:                                  mAB = 7