Multiple choice

On simplifying ( a + b - 3) - ( b - a + 3) + ( a - b + 3) the result is

  1. a - b + 3

  2. a - b - 3

  3. 3a - b - 3

  4. 3a + b + 3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

(a + b - 3) - (b - a + 3) + (a - b + 3) = a + b - 3 - b + a - 3 + a - b + 3. Combining like terms: (a + a + a) + (b - b - b) + (-3 - 3 + 3) = 3a - b - 3.

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