It is a mixed number because 12/2 can be written as 6 instead of 12/2
385 + 326 + 298 = 1,009 / 3 = 336.33
385 + 326 + 298 + x = 350
350 x 4 = 1,400
1,400 - 1,009 = 391
385 + 326 + 298 + 391 = 1,400 / 4 = 350
The answer is $391
4b + 2 is your answer just to help you out if you use cymath you can easily get your answer like i did