1) 3 1/8...

1) 3 1/8 : ( х - 4 7/24 ) = 17/18 + 1 5/62) ( 4 1/5 : х + 1 1/3 ) : 2 4/35 - 4/5 = 1 8/15

 

3 1/8 : ( х - 4 7/24 ) = 17/18 + 1 5/6
3 1/8х-4 7/24)=(17+33)/18
3 1/8х-4 7/24)=2 7/9
х-4 7/24=(25*9)/(8*25)
х=1 1/8+4 7/24
х=5 10/24
х=5 5/12
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( 4 1/5 : х + 1 1/3 ) : 2 4/35 - 4/5 = 1 8/15
(4 1/5:х+1 1/3):2 4/35=1 8/15+4/5
4 1/5:х+1 1/3=(7*74)/(3*35)
4 1/5:х=4  14/15-1 1/3
4,2:х=3,6
х=4,2/3,6
х=1 1/6