Question

Решите уравнения!!!!!!!!!!!!
7+(х-3)=9
2(х-4)=1
х+0,75х=28

Answer 1

7+(х-3)=9
7+x-3=9
4+x=9
x=9-4
x=5
----------
2(х-4)=1
2x-8=1
2x=1+8
2x=9
x=9:2
x=4,5
-------
х+0,75х=28
1,75x=28
x=28:1,75
x=16
==============