What is the solution of 1/2 x + 3x = 14?​

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.

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0