Respuesta :

x + 7y + 3z

Explanation:

The expression: 4x + 2y + 6z - 3x + 5y - 3z​

collect like terms by bringing same letters together:

= 4x - 3x + 2y + 5y + 6z - 3z

= x + 7y + 3z

Since the letters are different, we can't simplify any further

The simplified form: x + 7y + 3z

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