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Verified answer
3a - 5b + 10 + 3a - 5b - 5 = 3a + 3a -5b - 5b + 10 - 5= 6a - 10b + 5
Verified answer
3a - 5b + 10 + (3a - 5b - 5)= 3a - 5b + 10 + 3a - 5b - 5
= 3a + 3a - 5b - 5b + 10 - 5
= 6a - 10b + 5