Mathematics

(5x - 4y) - (5y - 4x) is equal to:

  1. 9(x - y)

  2. x - y

  3. (y - x)

  4. 0

Algebraic Expressions

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Answer

(5x - 4y) - (5y - 4x)

= 5x - 4y - 5y + 4x

= (5x + 4x) + (-4x - 5y)

= 9x + (- 9y)

= 9x - 9y

= 9(x - y)

Hence, option 1 is the correct option.

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