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From 4a + 7b - 12c subtract 8a - 9b + 12d.
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From 4a + 7b - 12c subtract 8a - 9b + 12d.

User Paulcm
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2 Answers

5 votes
4a + 7b - 12c
8a - 9b + 12d
- + -

-4a + 16b

User Mirel Vlad
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3 votes
4a-8a=-4a 7b-(-9b)= 7b+9b=16b (-12c)-12c=-24c -4a+16b-24c
User GusOst
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