subtract the sum of (2a - 3b) and (5b + 7a) from the sum of (17a - 8b) and (2b - 12a )
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Step-by-step explanation:
2a -3b+5b+7a
=9a +2b
17a-8b +2b -12a
=5a -6b
5a - 6b -(9a +2b)
=5a -6b -9 a -2b
=-4a -8b
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