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12a-7b-(4a-21b)=.......
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5 votes
12a-7b-(4a-21b)=.......

User Karl Bartel
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4 votes
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User Luis Valdez
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7.9k points
7 votes
12a-7b-(4a-21b) distribute
12a-7b-4a+21b combine like terms
8a+14b

This is my best try. That's how I would do it.
User FLP
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8.3k points
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