No links, no I dont knows, math home work review sheet 1

please atleast try to awnse 2-3

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.

4+(2+x) can you me solve this problem

Write the equations in logarithmic form 7^3=343