I. 3x²-13x-10=0

II. 3y²+10y-8=0

I. 12x²+7x+1=0

II. 6y²+5y+1=0

I. 25x²+35x+12=0

II. 10y²+9y+2=0

I.3x³-22x+40=0

II. 5y²-21y+16=0

I. x²-4x-12 = 0

II. y²-5y-14=0

A and B started a business with initial investments in the respective ratio of 18:7. After four months from the start of the business. A invested INR 2000/- more and B invested INR 7000/- more. At the end of one year. If the profit was distributed among them in the ratio of 2:1 respectively, what was the total initial investment with which A and B started the business