Question

8,36-5,36:(0,2k+0,47k)=7,56

Answer 1

-5,36/0,67к=7,56-8,36
-8к=-1
к=0,125

Answer 2

8,36-5,36:0,67к=7,56
5,36:0,67к=8,36-7,56
5,36:0,67к=0,8
0,67к=5,36:0,8
0,67к=6,7
к=6,7:0,67
к=10