2. Solve by equating the coefficients for x and y:
(i) 3x + 2 y +1 =0, 2x-3y +8 = 0
(ii) 6x +9y = 57, 9x+6y = 48
(iii) (a + b)x+(a - b)y = 2ab, a =0,b=0,
(a + b)x -(a - b)y = ab
(iv) 37x + 71y = 287, 71x +37y = 253
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