Question

4. Решите уравнение: ( 12 - + (12+y) - 9 = 75 13 9 13 13​

Answer 1

$12\frac{5}{13}+y-9\frac{9}{13}=7\frac{7}{13}$

$y=9\frac{9}{13}+7\frac{7}{13}-12\frac{5}{13}$

$y=4\frac{11}{13}$

Answer 2

( 12 5/13 + y ) - 9 9/13 = 7 7/13

12 5/13 + y = 17 3/13

y = 17 3/13 - 12 5/13

y = 16 16/13 - 12 5/13

y = 4 11/13

Ответ: 4 11/13