7,3х-1/3=-1,2х+3
-1/3-3=-1,2х-7,3х
-10/3=-8,5х
х=-10/3:(-8,5)
х=20/51
5*(х-1)-4*(х-2)=10
5х-5-4х+8=10
х+3=10
х=7
7*(х-9)-(3х+1)=9
7х-63-3х-1=9
4х-64=9
4х=73
х=18,25
7,3х-1/3=-1,2х+3
-1/3-3=-1,2х-7,3х
-10/3=-8,5х
х=-10/3:(-8,5)
х=20/51
5*(х-1)-4*(х-2)=10
5х-5-4х+8=10
х+3=10
х=7
7*(х-9)-(3х+1)=9
7х-63-3х-1=9
4х-64=9
4х=73
х=18,25