Sum of 3a + 6b - 7c + 9 and 12b -7b -2c + 10
Answers
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0
Answer:
15a-b-9c+19
it the answer
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Answered by
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Step-by-step explanation:
3a+6b-7c+9+12b-7b-2c+10
= 3a+6b+12b-7b-7c-2c+10+9
=3a+11b-9c+19
this is the answer
3a+11b-9c+19
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