Question

(5/7 - 2/3 y )x 21 равняется 1​

Answer 1

Ответ:

Пошаговое объяснение:

(5/7 - 2/3y )* 21 = 1​

5/7 - 2/3y = 1/21

2/3y = 5/7 - 1/21

2/3y = 15/21 - 1/21

2/3y = 14/21 = 2/3

y = 2/3 * 3/2

y = 1

Answer 2

To solve the equation "(5/7 - 2/3y) * 21 = 1," we can follow these steps:

1. Distribute the 21 to the terms inside the parentheses: (5/7 * 21) - (2/3y * 21) = 1

2. Simplify the expressions: (15/7) - (42/3)y = 1

3. Convert the fractions to have a common denominator: (15/7) - (14/1)y = 1

4. Multiply each term by 7 to clear the denominators: 15 - 98y = 7

5. Simplify: -98y = 7 - 15 -98y = -8

6. Divide both sides of the equation by -98 to solve for y: y = (-8) / (-98)

7. Simplify the fraction: y = 4/49

Therefore, the solution to the equation is y = 4/49.