Sub 2a+5b+2c-9 from 3a-4b-c+b
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a+10b+3c+9 is the answer
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Answer:
The rule is;
The expression after from is written first:
(3a-4b-c+6)- (2a+5b+2c-9)
3a-4b-c+6-2a-5b-2c+9
=a -9b -3c+15
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