1. х+(2х-7)/2-(3х+1)/5=5-(х+6)/2=
=(10х+(2х-7)5-(3х+1)2)/10=(5*10-(х+6)5)/10
10х+10х-35-6х-2=50-5х-30
14х-37=20-5х
14х+5х=20+37
19х=57
х=57/19
х=3
2.
х/(х-3)+(1-5х)/(х*х-2х-3)=1/(х+1)
1/(х+1)-х/(х-3)=(1-5х)/(х*х-2х-3)
(х-3-(х+1))/(х*х-2х-3)
-4 =1-5х
-5=5х
х= -1