1. 5 5/6: 3 1/2=x:15 2. (8x+2,4):3=1,8

Question

1. 5 5/6: 3 1/2=x:15

2. (8x+2,4):3=1,8

Answer 1

1)
х=15*35/6:7/2=(15*35*2)/(1*6*7)=25
2)
8х+2,4=1,8*3
8х=5,4-2,4
х=3/8=0,375