Question

решите уровнения 1- k =3/5+ 1/10

Answer 1

1-k=3/5+1/10
1-k=0.6+0.1
1-k=0.7
-k=-1+0.7
-k=-0.3
k=0.3
или же 
1-k=6/10+1/10
1-k=7/10
-k=-1-7/10
-k=-3/10
k=3/10