5/9 q=1 4/5; 2/3y +1 5/6=3 1/6

1)5/9q=1цел4/5 q=9/5÷5/9 q=9/5 × 9/5 q=81/25 q=3цел6/25 2)(2/3)у+1цел5/6=3цел1/6 (2/3)у=3цел1/6-1цел5/6 (2/3)у=2цел7/6-1цел5/6 (2/3)у=1цел2/6 (2/3)у=1цел1/3 у=1цел1/3÷2/3 у=4/3 × 3/2 у=2