Question

(4/5-k)-1/3=1/6-1/10

Answer 1

(4/5-к)-1/3=1/6-1/10 
4/5-к-1/3=1/6-1/10
к=1/6-1/10-4/5+1/3
к=5/30-3/30-24/30+10/30
к=-12/30=-4/10=-0,4