Respuesta :

Answer:

= −21x−7

Step-by-step explanation:

−7(1+3x)

=(−7)(1+3x)

=(−7)(1)+(−7)(3x)

=−7−21x

= −21x−7

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We are asked to multiply -7 by (1+3x)

All we have to do is multiply -7 by 1 and 3x:

-7-21x

I have used the Distributive Property to solve this problem.

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