Question

решите уравнения ( 1:3+1:2)*х=3,75.(7:8-0,2)*х=8,1

Answer 1

1/3х+1/2х=3,75
5/6х=3,75
х=3,75:5/6
х=4,5

7/8х-0,2х=8,1
7/8х-1/5х=8,1
27/40х=8,1
х=8,1:27/40
х=12