Question

0,6-1,6(х-4)=3(7-0,4х)

Answer 1

0.6-1.6х+5.2=21-1.4х
-1.6х+1.4х=21-5.2-0.6
-0.2х=15.2
х=-76

Answer 2

0,6-1,6х+6,4=21-1,2х
-0,4х=-7+(+21)
-0,4х=14
х=-35