10 : 1 ( 7/8 ) = 8X - 2X - 3X
10 : ( 15/8 ) = X * ( 8 - 2 - 3 )
80/15 = X * 3
X = ( 16/3 ) : 3
X = 16/9
X = 1 ( 7/9 )
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3 ( 2/45 ) X + 1 ( 7/30 ) X = 6 ( 1/9 )
(137/45 ) X + ( 37/30 ) X = 55/9
( 274/90 ) X + ( 111/90 ) X = 550/90
274X + 111X = 550
385X = 550
X = 1 ( 165/385 )
X = 1 ( 33/77 )
X = 1 ( 3/7 )
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( 8 2/5 : X + 3 5/9 ) : 4 ( 1/6 ) = 1 ( 1/3 )
8 ( 2/5 ) : X + 3 ( 5/9 ) = 1 ( 1/3 ) * 4 ( 1/6 )
8 ( 2/5 ) : X + 3 ( 5/9 ) = ( 4/3 ) * ( 25/6 )
8 ( 2/5 ) : X + 3 ( 5/9 ) = 50/9
8 ( 2/5 ) : X = 5 ( 5/9 ) - 3 ( 5/9 )
8 ( 2/5 ) : X = 2
X = 8 ( 2/5 ) : 2
X = 8,4 : 2
X = 4,2
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( 5 1/6 - X ) * 2 ( 7/10 ) - 1 ( 3/14 ) = 3 ( 2/7 )
( 5 1/6 - X ) * 2 ( 7/10 ) = 3 ( 2/7 ) + 1 ( 3/14 )
( 5 1/6 - X ) * 2 ( 7/10 ) = 3 ( 4/14 ) + 1 ( 3/14 )
( 5 1/6 - X ) * 2 ( 7/10 ) = 4 ( 1/2 )
5 ( 1/6 ) - X = 4 ( 1/2 ) : 2 ( 7/10 )
5 ( 1/6 ) - X = ( 9/2 ) : ( 27/10 )
5 ( 1/6 ) - X = 1 ( 2/3 )
X = 5 ( 1/6 ) - 1 ( 2/3 )
X = 4 ( 7/6 ) - 1 ( 4/6 )
X = 3 ( 1/2 )