subtract the following
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Step-by-step explanation:
a.So, 4a - 7ab + 3b + 12 (From)12a - 9ab + 5b - 3
(12a - 9ab + 5b - 3) - (4a - 7ab + 3b +12)
12a - 9ab + 5b - 3 - 4a + 7ab - 3b -12
12a - 4a - 9ab + 7ab + 5b - 3b - 3 - 12
Answer Is, 8a - 2ab + 2b -15
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