Question

7(целых)4/5 : 2(целых)3/5 = 4(целых)1/2 : y

Answer 1

7(целых)4/5 : 2(целых)3/5 = 4(целых)1/2 : y
7_4/5 : 2_3/5 = 4_1/2 : у
39/5 : 13/5 = 9/2 : у
39/5 * 5/13 = 9/2 : у
3 = 9/2 :у
неизвестное  делитель, для нахождения  его делимое  делим на частное, получаем:  
у= 9/2 : 3
у= 9/2 *1/3
у= (9*1) / (2*3)
у=3/2
у= 1_1/2

Answer 2

To solve the equation, let's convert the mixed numbers into improper fractions first.

7(целых)4/5 can be converted to an improper fraction as follows: 7(целых)4/5 = (7 * 5 + 4)/5 = 39/5

2(целых)3/5 can be converted to an improper fraction as follows: 2(целых)3/5 = (2 * 5 + 3)/5 = 13/5

4(целых)1/2 can be converted to an improper fraction as follows: 4(целых)1/2 = (4 * 2 + 1)/2 = 9/2

Now we can rewrite the equation as:

(39/5) : (13/5) = (9/2) : y

To divide fractions, we can multiply the first fraction by the reciprocal of the second fraction:

(39/5) * (5/13) = (9/2) : y

Now let's simplify the equation:

39/5 * 5/13 = 9/2 : y

The 5 in the numerator of the first fraction cancels with the 5 in the denominator, leaving us with:

39/13 = 9/2 : y

To divide fractions, we can multiply the first fraction by the reciprocal of the second fraction:

39/13 * 2/9 = y

Now let's simplify the equation:

(39 * 2)/(13 * 9) = y

78/117 = y

We can simplify the fraction 78/117 by dividing both the numerator and denominator by their greatest common divisor, which is 39:

78/117 = (78/39) / (117/39) = 2/3

Therefore, y = 2/3.