Respuesta :

Answer: −5.7a

Step-by-step explanation: Rewrite the equation: 12a+3.6a−( 74 /5 a+6a−8.7a)−9.2a

Combine like terms: 12a+3.6a+ −74 /5 a+−6a+8.7a+−9.2a

-5.7a

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