Plz help!!

Explain the solution

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30

X– 4 = 12.5 can be written in words as