415 + 815 + 1315 = 2545
615 is the mean.
815 + 34 = 849
49 + 415 = 464
10 + 3 + 412 - 10 = 415
It is 415 plus 375 equals 790
It is not possible to "solve" b+815 because it is an expression - not an equation or inequality.
The answer is: 477
51766
772
9:30.
2% of 1315 = 2% * 1315 = 0.02 * 1315 = 26.3
363 + 52 = 415