7. What must be added to 10a2b+8ab? -8aºbº - b* to get 7ab? - 46° -3ab+5023
sides a
8. Subtract the sum of 8a-5b - 7c and -6a+ 7b-4c from the sum of 6a + 20 - 3c and-2 n
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(6a + 20 - 3c - 2) - (8a - 5b -7c - 6a + 7b - 4c)
= 6a + 18 - 3c - (2a + 2b -11c)
= 6a + 18 - 3c - 2a - 2b + 11c
= 4a + 18 + 8c - 2b
= 6a + 18 - 3c - (2a + 2b -11c)
= 6a + 18 - 3c - 2a - 2b + 11c
= 4a + 18 + 8c - 2b
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