Answers − Simplifying like terms

  1.   2a + 3a

  2.   3a − 4b + 5a + 6b

  3.   4x − 3y + 4x + 3y

  4.   5a + 5ab + 6a + 7ab

  5.   3x + 4xy + 7x − 4xy

  6.   2b² + 17b + 4b² + 5b

  7.   10y² − 17y − 14y² + 5y

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