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( 2a + 3b - 4c ) ; ( 8c + 4a - 5b ) and ( 6b + 5c - 2a )

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Solution

(2a+3b-4c)+(8c+4a-5b)+(6b+5c-2a)
=(2a+4a-2a)+(3b-5b+6b)+(-4c+8c+5c)[write a terms b terms and c terms together]
=4a+4b+9c

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