37. What should be subtracted from 15x² - 6y? + 7xy + 19 to obtain 3x?-1 2y + 4xy - 31?
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Answer :-
→ 15x² - 6y + 7xy + 19 - (3x - 12y + 4xy - 31)
→ 15x² - 6y + 7xy + 19 - 3x + 12y - 4xy + 31
→ 15x² - 6y + 12y + 7xy - 4xy + 19 + 31 - 3x
→ 15x² + 6y + 3xy + 50 - 3x
→ 15x² - 3x + 6y + 3xy + 50
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