1 answer:
Answer:
mAB = 7
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
<u>Algebra I</u>
- Terms/Coefficients/Degrees
Step-by-step explanation:
<u>Step 1: Define</u>
<em>Set up equation.</em>
mAB + mBC = mAC
x + 4 + 4 = 3x + 2
<u>Step 2: Solve for </u><em><u>x</u></em>
- Combine like terms: x + 8 = 3x + 2
- Isolate <em>x</em> terms: 8 = 2x + 2
- Isolate <em>x </em>term: 6 = 2x
- Isolate <em>x</em>: 3 = x
- Rewrite: x = 3
<u>Step 3: Find AB</u>
- Define: mAB = x + 4
- Substitute in <em>x</em>: mAB = 3 + 4
- Add: mAB = 7
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