Respuesta :

Sinnamin
Multiply the 7 in to each part of the parenthesis. So 7(3x-4) would be the same as 7(3x) - 7(4).

This can be simplified as:
21x - 28
Which is your answer.

I hope this Helps!
take the 7 and multiply is with everything in the parenthesis
21x-12

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