Question

1) б) (2,8-x):0,3=5 г)0,39:x=0,16 2) (16,1:4,6-3,07)*0,2 3) (3,7*2,3-5):0,3=282

Answer 1

1.б) (2,8 - х) : 0,3 = 5          1.г) 0,39 : х = 0,16

2,8 - х = 5 * 0,3                    х = 0,39 : 0,16

2,8 - х = 1,5                          х = 2,4375 - первый вариант ответа

х = 2,8 - 1,5                          х = 39/16

х = 1,3                                  х = 2 7/16 - второй вариант ответа          

2. (16,1 : 4,6 - 3,07) * 0,2 = 0,086

1) 16,1 : 4,6 = 3,5

2) 3,5 - 3,07 = 0,43

3) 0,43 * 0,2 = 0,086

3. (3,7 * 2,3 - 5) : 0,3 = 11,7

1) 3,7 * 2,3 = 8,51

2) 8,51 - 5 = 3,51

3) 3,51 : 0,3 = 11,7

      

Answer 2

б) (2,8-x):0,3=5

To solve for x, we can start by multiplying both sides by 0.3:

(2.8 - x) = 5 * 0.3

Simplifying the right side:

(2.8 - x) = 1.5

Subtracting 2.8 from both sides:

-x = -1.3

Dividing both sides by -1:

x = 1.3

Therefore, the solution is x = 1.3.

г) 0,39:x=0,16

To solve for x, we can start by multiplying both sides by x:

0.39 = 0.16x

Dividing both sides by 0.16:

x = 0.39/0.16

Simplifying the right side:

x = 2.4375

Therefore, the solution is x = 2.4375.

2. (16,1:4,6-3,07)*0,2

We can start by simplifying the expression inside the parentheses:

16.1 / (4.6 - 3.07) = 16.1 / 1.53 = 10.5229

Multiplying this result by 0.2:

10.5229 * 0.2 = 2.10458

Therefore, the solution is 2.10458.

3. (3,7*2,3-5):0,3=282

We can start by simplifying the expression inside the parentheses:

3.7 * (2.3 - 5) = 3.7 * (-2.7) = -9.99

Dividing this result by 0.3:

-9.99 / 0.3 = -33.3

Therefore, the solution is -33.3.