Question

Решить уравнение
(10 1/7-у):1 1/7+2 5/8=7 1/8

Answer 1

(10  1/7 - y) : 1  1/7 + 2  5/8 = 7  1/8
(10  1/7 - y) : 1  1/7  = 7  1/8 - 2  5/8
(10 1/7 - y) : 1  1/7 = 6  9/8 - 2  5/8
(10  1/7 - y) : 1  1/7 = 4  4/8
10 1/7 - y = 4  1/2 * 1  1/7
10  1/7 -y = 9/2 * 8/7
10  1/7   - y =  9/2 * 4/7
10  1/7 - y = 36/7
10  1/7 -y = 5  1/7
y =  10  1/7 - 5  1/7
y = 5 

Answer 2

(71/7-у)*7/8+21/8=57/8
71/8-7/8 *у +21/8=57/8
-7/8*у=57/8-71/8-21/8
-7/8*у=-35/8
у=(35/8)/(7/8)=(35/8)*(8/7)=5