(5 2/9у +5 1/3 ) *3 - 7 2/3у, если у=3 1/8, у=1,4

5÷=_€÷28478¥2&÷743^77200=&4889×8338=$&

1) 3 * ( 5 ( 2/9 ) y + 3 ( 1/3 ) ) = 3 * ( ( 47/9 ) y + ( 10/3 )) = ( 47/3 ) y + 10

2) ( 47/3 ) y + 10 - 7 ( 2/3 ) y = ( 47/3 ) y + 10 - ( 23/3 ) y = ( 24/3 ) y + 10 = 8y + 10

2) y = 3 (1/8 ) = ( 25/8 )

8 * ( 25/8 ) + 10 = 25 + 10 = 35

3) y = 1,4

8 * 1,4 + 10 = 11,2 + 10 = 21,2