Respuesta :

abelazaangallardo

Answer:

3*(7*d)+(4e)=3*7d+4e

Step-by-step explanation:

The expression in the expanded form should be 21d + 12e

Given information:

The equation is 3(7d + 4e)

Expression:

=  3(7d + 4e)

= 21d + 12e

Learn more about the expression here: https://brainly.com/question/4114094

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