The sum of two times of a number plus 78 is equal to six times of the number. Find the number (list the equation and find the solution of the equation)

The sum of two times of a number plus 78 is equal to six times of the number. Find the number (list the equation and find the solution of the equation)

2x+78=6x
6x-2x=78
4x=78
x=19.5