Question

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

Answer 1

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

Step-by-step 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