Question

1.(3, 2²-6,82):5,7+87,4 2. Решите уравнение (27,4-0,2x)×0,08=1,6

Answer 1

Ответ:

Пошаговое объяснение:

(3, 2²-6,82)=10,34-6,82=3,42

3,42:5,7=0,6

0,6+87,4=88

(27,4-0,2x)×0,08=1,6

27,4-0,2х=1,6:0,08

27,4-0,2х=20

-0,2х=20-27,4

-0,2х=-7,4

Х=-7,4:(-0,2)

Х=37

Answer 2

1. To solve the expression (3, 2²-6,82):5,7+87,4, we need to follow the order of operations, which is PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction):

First, we need to solve the expression inside the parentheses: 2² = 4, so the expression becomes (3, 4-6,82):5,7+87,4.

Then, we need to perform the division (represented by the symbol ":"), so we have:

(3, 4-6,82) = -3,42

Therefore, the expression becomes: -3,42:5,7+87,4

Next, we need to perform the addition, so we have:

-3,42 + 5,7 = 2,28

Therefore, the final result is:

2,28 + 87,4 = 89,68

So the solution to the expression (3, 2²-6,82):5,7+87,4 is 89,68.

2. To solve the equation (27,4-0,2x)×0,08=1,6, we need to isolate the variable x. We can do this by dividing both sides of the equation by 0.08:

(27,4-0,2x) = 1,6/0,08

Simplifying the right side, we get:

1,6/0,08 = 20

So the equation becomes:

27,4 - 0,2x = 20

Now we can isolate x by subtracting 27,4 from both sides:

-0,2x = 20 - 27,4

Simplifying the right side, we get:

-0,2x = -7,4

Finally, we can solve for x by dividing both sides by -0,2:

x = (-7,4)/(-0,2)

Simplifying, we get:

x = 37

Therefore, the solution to the equation (27,4-0,2x)×0,08=1,6 is x = 37.