What is the resulting equation when the expression for y in the second equation is substituted into the first equation?

3x + y = 1
y = 6 - 4x

(A). -x + 6 = 1
(B). x + 6 = 1
(C). 7x + 6 = 1

Respuesta :

I believe the answer is a
it is a i have had this queston before

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