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27 votes
27 votes
Select the expression equivalent to (-4x + 4.2y) - (-7x + 3.4y)

User Donkeydown
by
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1 Answer

13 votes
13 votes

Answer:

3x + 0.8y

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

Distributive Property

Algebra I

  • Terms/Coefficients

Explanation:

Step 1: Define

(-4x + 4.2y) - (-7x + 3.4y)

Step 2: Simplify

  1. [Distributive Property] Distribute negative: -4x + 4.2y + 7x - 3.4y
  2. Combine like terms (x): 3x + 4.2y - 3.4y
  3. Combine like terms (y): 3x + 0.8y
User Amr Elgarhy
by
2.9k points