What should be added to -3a²b²c + 2abc² + 18 to get 7a²b²c + 11abc²-7?
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Answer:
10a²b²c + 9abc²- 25
Step-by-step explanation:
(7a²b²c + 11abc² - 7) - (-3a²b²c + 2abc² + 18)
(7a²b²c + 11abc² - 7 + 3a²b²c - 2abc² -18)
(7a²b²c + 3a²b²c) + (11abc² - 2abc²) + (- 7 -18)
10a²b²c + 9abc²- 25
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