Drag numbers to complete the table for missing values of x, x2, x3

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

7+(3n++8) what is the answer to this?