Question

what must be added to 5a-3b+2c to get 3a-4b+7c​

Answer 1

=(5a-3b+2c)-(3a-4b+7c)

=5a-3b+2c-3a+4b-7c

=2a+b-5c

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Answer 2

Answer:

5a-3b+2c + [(-2a)+(-b)+5c]

[(-2a)+(-b)+5c]

must be added to obtain 3a-4b+7c

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