Question

A)2/11x ＝4/9 б)1 3/4y＝2 2/7 в)12z- 3z＝3/5

Answer 1

Ответ:

А) хз

Б) хз

В) 9z = 3/5

z = 3/45 или 1/15

Пошаговое объяснение:

Answer 2

A) To solve the equation 2/11x = 4/9, you can cross-multiply:

(2/11)x = 4/9

9(2/11)x = 4

18/11x = 4

To isolate x, you can multiply both sides by the reciprocal of 18/11, which is 11/18:

(11/18)(18/11x) = (11/18)(4)

x = 44/18

Simplifying the fraction:

x = 22/9

Therefore, the solution to the equation is x = 22/9.

B) To solve the equation 1 3/4y = 2 2/7, you can convert the mixed numbers to improper fractions:

7/4y + 3/4 = 16/7 + 2/7

Combining the fractions:

7/4y + 3/4 = 18/7

To simplify the equation, you can multiply both sides by 4 to eliminate the denominators:

4(7/4y + 3/4) = 4(18/7)

7y + 3 = 72/7

Multiply both sides by the reciprocal of 7/1, which is 1/7:

(1/7)(7y + 3) = (1/7)(72/7)

y + 3/7 = 72/49

Subtract 3/7 from both sides:

y = 72/49 - 3/7

To add these fractions, you need a common denominator, which is 49:

y = (72/49)(7/7) - (3/7)(7/7)

y = 504/343 - 21/49

Simplify the fractions:

y = 504/343 - 63/343

y = (504 - 63)/343

y = 441/343

The solution to the equation is y = 441/343.

C) To solve the equation 12z - 3z = 3/5, you can combine like terms on the left side:

(12 - 3)z = 3/5

9z = 3/5

To isolate z, you can multiply both sides by the reciprocal of 9/1, which is 1/9:

(1/9)(9z) = (1/9)(3/5)

z = 3/45

Simplifying the fraction:

z = 1/15

Therefore, the solution to the equation is z = 1/15.