Equation 3x + 2y = 2 name solution as ordered pair

What can you determine about the solutions of this system

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 i need !

Which shows the correct substitution of the values a, b and c from the equation 1=-2x+3x^2+1