I.                    4x²+19x+22=0

II.                  2y²+11y+15=0

I.                     2x²-9x+9=0

II                     y²-7y+12=0

I                     4x²-8x+3=0

II                    4y²-15y+14=0

I                     3x²-13x+14=                 

II                    2y²-5y+3=0

I                     2x² – 21x +52 = 0

II                   2y² – 11y+12=0

Two mobile phones were purchased at the same price. One was sold at a profit of 30% and the second was sold at a price which was INR 2500/- less than the price at which the first was sold. If the overall profit earned by selling both the mobile phones was 5%, what was the cost price of one mobile phone