Question

6х+2х+18=78

Пожалуйста помогите.

Answer 1

8х+18=78
8х=78-18
8х=60
х=60:8
х=7.5 или 7 и 1/2

Answer 2

6х+2х+18=78
6х+2х=78-18
6х+2х=60
8х=60
х=60/8
х=7.5