The sum of two times of a number and three times of it is equal to half of 80

The sum of two times of a number and three times of it is equal to half of 80


Let this number be X
2X+3X=80÷2
5X=40
X=8



5 times of a number and 3 times of it get 56.4, find this number


Let this number be X
5X+3X=56.4
8X=56.4
X=56.4÷8
X=7.05