12a+3b-cfrom the sum of 7a+4b-5c and 6a-7c-8
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Answer:
a+b-11c-8
Step-by-step explanation:
(7a+4b-5c+6a-7c-8)-12a+3b-c
= 13a+4b-12c-8-12a+3b-c
= a+b-11c-8
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