1.

Add 7a-2b+5c and -13a-4b+7c

Answer» YOO!! bro/sis ✌✌ 7a - 2b + 5C + ( - 13A - 4b + 7c ) = 7a - 13a - 2b - 4b + 5c + 7c = -6A - 6b + 12C.


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