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

Mathematics

1 answer:

Alina [70]3 years ago

4 0

Answer:

3x + 0.8y

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
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

[Distributive Property] Distribute negative: -4x + 4.2y + 7x - 3.4y
Combine like terms (x): 3x + 4.2y - 3.4y
Combine like terms (y): 3x + 0.8y

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