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. 7x + 6 = 1
B. -x + 6 = 1
C. x + 6 = 1

Alina fully simplifies this polynomial and then writes it in standard form. xy2 – 2x2y + 3y3 – 6x2y + 4xy2 if alina wrote the last term as 3y3, which must be the first term of her polynomial in standard form? xy2 5xy2 –8x2y –2x2y