1) 5.6\3х+12=0.4/3
2)8.7/15+4х=0.5/2
3)3х+1.6/2.4=5/1.2
4)5.4/3=0.9/4.7х-4.2

1)0,4(3х+12)=5,6×31,2х+4,8=16,81,2х=16,8-4,81,2х=12х=12÷1,2х=102)0,5(15+4х)=2×8,77,5+2х=17,42х=17,4-7,52х=9,9х=9,9÷2х=4,953)1,2(3х+1,6)=2,4×53,6х+19,2=123,6х=19,2-123,6х=7,2х=7,2÷3,6х=24)5,4(4,7х-4,2)=3×0,925,38х-22,68=2,725,38х=2,7+22,6825,38х=25,38х=25,38÷25,38х=1