Question

9a+7a+4a-(-8a)-a.....​

Answer 1

here is ur answer

9a+7a+4a-(-8a) -a

20a -(-9a)

20a + 9a

29a answer

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Answer 2

$9a + 7a + 4a - ( - 8a) - a \\ = > 16a + 4a + 8a - a \\ = > 28a - a \\ = > 27a$