___ and ___ don't live in same type of flat.
O lives in flat 2 on odd numbered floor S lives above O in the same type of flat and to the east of T. 3. T doesn’t live on floor 3. So, O lives on flat 2 of floor 3 or flat 2 of floor 1. Case W: O lives on flat 2 of floor 3: 
Case II: O lives on flat 2 of floor 2: Case II(a): 
Q and V live in the same type of flat such that Q lives immediately above V but below floor 3. Q lives in southeast of T. X lives to the west of Q. X and U live in the same type of flat and X lives immediately above U, this is not possible in case II(b), so case II(b) is rejected. . U doesn’t live in flat 1, so case II(a) is rejected. So, X lives in flat 2 of floor 2 and U lives in flat 2 of floor 1. Q and V lives in flat 3. 
I. 2y2- 37y + 143 = 0
II. 2x2+ 15x – 143 = 0
I.8(x+3)+ 8(-x)=72
II. 5(y+5)+ 5(-x)=150
I. x2 – 13x + 40 = 0
II. 2y2 – 15y + 13 = 0
I. (2x-3)3+ 1/((2x-3)³)=2
II. 4y²+(y+8)^2= 157
I. 17x² - 26x – 16 = 0
II. 17y²- 26y + 9 = 0
I. 20y² - 13y + 2 = 0
II. 6x² - 25x + 14 = 0
I. 6x2 + 23x + 10 = 0
II. 2y2 - 3y - 5 = 0
I. 3x2 – 16x + 21 = 0
II. y2 – 13y + 42 = 0
I. 2y2 + 31y + 99 = 0
II. 4x2 + 8x – 45 = 0
I. 2x2– 5x – 63 = 0
II. 2y2– 7y – 72 = 0
