find: 1. 7ab+9b+6a-(ab+4b-5a)
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Answer:
6ab + 5b + 11a
Step-by-step explanation:
7ab + 9b + 6a - ( ab + 4b - 5a)
= 7ab + 9b + 6a - ab - 4b + 5a
= 7ab - ab + 9b - 4b + 6a + 5a
= 6ab + 5b + 11a
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