Question

ПОМОГИТЕ РЕШИТЬ ПЖ (-3/14-8/21):20/21

Answer 1

(-3/14-8/21):20/21= - 5/8
1) - 3/14  -  8/21 = -9/42  -  16/42 =  - 25/42
2)  - 25/42 : 20/21 =  - 25/42 *  21/20 =525/840=  - 5/8

Answer 2

To solve the expression (-3/14 - 8/21) ÷ (20/21), we can follow these steps:

Step 1: Simplify the expression within the parentheses (-3/14 - 8/21). To add or subtract fractions, we need a common denominator. In this case, the common denominator is 14 * 21 = 294.

-3/14 can be written as (-3/14) * (21/21) = -63/294. 8/21 can be written as (8/21) * (14/14) = 112/294.

Now we can subtract the fractions: -63/294 - 112/294 = -175/294.

Step 2: Divide the result from Step 1 by 20/21. To divide fractions, we multiply the first fraction by the reciprocal of the second fraction.

(-175/294) ÷ (20/21) can be written as (-175/294) * (21/20).

Now we can multiply the fractions: (-175/294) * (21/20) = -3675/5880.

Step 3: Simplify the result. To simplify the fraction -3675/5880, we can divide both the numerator and denominator by their greatest common divisor (GCD). In this case, the GCD is 15.

-3675/5880 can be simplified to -245/392.

Therefore, the solution to the expression (-3/14 - 8/21) ÷ (20/21) is -245/392.

Please let me know if you need further assistance!