Input: coeff[] = {1, 2}, rhs = 5 Output: 3 The equation "x + 2y = 5" has 3 solutions. (x=3,y=1), (x=1,y=2), (x=5,y=0) Input: coeff[] = {2, 2, 3}, rhs = 4 Output: 3 The equation "2x + 2y + 3z = 4" has 3 solutions. (x=0,y=2,z=0), (x=2,y=0,z=0), (x=1,y=1,z=0)