How can x2+3x+1=2x2+2x+3 be set up as a system of equations

For this case we can write the system of equations as two equations with two unknowns.
 We then define the following unknowns:
 incognitas: x and y.
 We write the system of equations:
 y = x2 + 3x + 1
 y = 2x2 + 2x + 3
 
 y = x2 + 3x + 1
 y = 2x2 + 2x + 3

Ithink the answer is c