-4(0,3х-0,4)+6(-0,8х+0,2)

Question

-4(0,3х-0,4)+6(-0,8х+0,2)

Answer 1

-1.2х+1.6-4.8х+1.2=-6х+2.8

Answer 2

-1,2х+1,6-4,8х+1,2=-6х+2,8
2,8-6х=0
6х=2,8
х=2,8:6=28/10*1/6=28/60=7/15