1) (2156 + 214) / (2156 - 215) = 21 (56 + 4) / 21 (56 - 5) = 21 60 / 21 51 = 60 / 51 = 20 / 17
2) (3x - 15) / (4x - 20) = 3(x - 5) / 4(x - 5) = 3 / 4
1) (2156 + 214) / (2156 - 215) = 21 (56 + 4) / 21 (56 - 5) = 21 60 / 21 51 = 60 / 51 = 20 / 17
2) (3x - 15) / (4x - 20) = 3(x - 5) / 4(x - 5) = 3 / 4