1) k + 357 - 307 = 491k + 50 = 491k = 441
2) k + 357 - 288 = 491k + 69 = 491k = 422
3) k + 357 + 326 = 491k + 683 = 491k = -192
1) k + 357 - 307 = 491
k + 50 = 491
k = 441
2) k + 357 - 288 = 491
k + 69 = 491
k = 422
3) k + 357 + 326 = 491
k + 683 = 491
k = -192