1) 5х-3х=14
2х=14
х=7
3) -2х+11х=57-30
9х=27
х=3
1) 5х=3х+14
2х=14
х=7
2) 10-6(х-5)=21-5(0,5х+2,5)
10-6х+30=21-2,5х-12,5
-6х+2,5х=21-12,5-10-30
-3,5х=-31,5
х=9
3) 30-2х=57-11х
-2х+11х=57-30
9х=27
х=3
4) 4/5=3х-5/17-4х
-3х+4х=-5/17-4/5
х=-25/85-68/85
х=-93/85=1 8/85
