0,8х+х=63 х+х+4+2х=36

Question

0,8х+х=63 х+х+4+2х=36

Answer 1

Решаем 
4х+4=36
4х=36-4
4х=32
х=32/4
х=8

Answer 2

1) 1,8х=63

х=63/1,8

 х=35  

2) х+х+2х=36-4

4х=32

х=8