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-2.5(-3+4n+8)

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Answer:

-10n - 12.5

General Formulas and Concepts:

Pre-Algebra

Distributive Property

Order of Operations: BPEMDAS

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

Algebra I

  • Terms/Coefficients/Degrees

Step-by-step explanation:

Step 1: Define

-2.5(-3 + 4n + 8)

Step 2: Simplify

  1. Distribute -2.5:                    7.5 - 10n - 20
  2. Combine like terms:           -10n - 12.5
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A N S W E R :

For simplifying an expression, there are some rules about the order in which the calculations should be performed. The order of rules is called BODMAS. Each letter in this word stands for an operation.

  • B = Brackets
  • O = Off
  • D = Division
  • M = mass
  • A = addition
  • S = substraction

→ -2.5(-3 + 4n + 8) = 0

→ 7.5 + (-10n) + (-20) = 0

→ 7.5 - 10n - 20 = 0

→ -10n - 20 + 7.5 = 0

→ -10n - 12.5 = 0

→ -10n = 12.5

→ n = 12.5 ÷ -10

→ n = -1.25

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