Two times x divide five

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

What are the solutions of the system? y = x^2 + 2x +3y = 4x - 2a. (-1, -6) and (-3, -14)b. (-1, 10) and (3, -6)c. no solutiond. (-1, -6) and (3, 10)

If np3 /nc2 = 6, find the value of n