1) 0,4(х-3)-1,6=5(0,1х-0,5)
0,4х-1,2=1,6+0,5х-2,5
0,4х-0,5х=1,6+1,2-2,5
-0,1х=0,3
х=-3
2) 1,5(2х-5)+2х=5(0,5х-1,5)-10
3х-7,5+2х=2,5х-7,5-10
3х+2х-2,5х=7,5-7,5-10
2,5х=-10
х=-4
3) 2/3(1 1/2х+3/5)-4/5(5/12х-1/2)=1 3/5
2/3(3/2х+3/5)-4/5(5/12х-1/2)=8/5
х+2/5-1/3х+2/5=8/5
х-1/3х=8/5-2/5-2/5
2/3х=4/5
х=4/5:2/3
х=12/10
х=1 1/5