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rewona [7]
3 years ago
15

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:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

Distributive Property

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

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

<u>Step 2: Simplify</u>

  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
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Answer:

51

Step-by-step explanation:

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ky has 3 times more books than grant and grant has 6 fewer books than Jaime if the total combined number of books is 176 how man
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Number of books each of them have:

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Grant: x - 6
Ky: 3 (x - 6)

There are 176 books in total, so we can write it down as:

176 = x + x - 6 + 3 (x - 6)
176 = x + x - 6 + 3 * x + 3 * (-6)
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Doublecheck:

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