Polynomials - put in descending order in terms of x:

12x²y³ - 6x³y² + 3y - 2x

must answer correctly and thoroughly to get brainliest answer and points.
you! : d

-6x^3y^2 + 12x^2y^3 - 2x + 3y is the answer. what the question is asking for you to do is rewrite the polynomial in order with the first group being the x with the largest exponent and the last being the group with the smallest exponent. the first 3 are easy to see bc the exponents go from 3 to 2 to 1. the last one however does not have a visual x component which makes it somewhat more complicated. the last group can be rewritten as 3yx^0 bc any number to the zero power is 1. this means that the last group has an x to the power of zero, thus putting it last in descending order

The answer is: y would equal 3 because if you simplify the equation then it would be y= 3x+9 and if you divide 3x and 9 by 3 it would equal 3. y= 3