3x+7/10=7x-2/16 2x-5/5-3x-2/4=5-2x/12 2x-5/3-5x+4/2=1-5x/4+5x+2/6

1.
(7-3)*х=7/10+2/16= (7*4+2*5)/40 = 38/40
х=3,8

2.
2х-3х+2х/12=5+5/5+2,4=8,4
(2*12-3*12+2)х/12=8,4;    х=8,4*12/(-10) = -10,08

3.
(2-5+5/4-5)*х=5/3-4/2+1+2/6
-6,75х=1;      х=1/(-6,75) ≈0,148