Question

1) 5-(7x+1)=-6x-3 2)-36x+17-4(8-9x)при x=11,3

Answer 1

Решение на фото..........

Answer 2

1). 5-7x-1= -6x-3; -7x+6x= -3+1-5; -x= -7; x= (-7)/(-1)=7. Ответ: x=7. 2). -36x+17-32+36x=0*x-15. подставляем значение: 0*11,3-15=0-15= -15.

Answer 3

Let's solve the given equations step by step:

1. 5 - (7x + 1) = -6x - 3

First, distribute the negative sign to the terms inside the parentheses:

5 - 7x - 1 = -6x - 3

Combine like terms:

4 - 7x = -6x - 3

To isolate the variables on one side, let's add 7x to both sides:

4 - 7x + 7x = -6x - 3 + 7x

4 = -6x + 4

Next, let's subtract 4 from both sides:

4 - 4 = -6x + 4 - 4

0 = -6x

Divide both sides by -6 to solve for x:

0 / -6 = -6x / -6

0 = x

So the solution to the equation is x = 0.

2. -36x + 17 - 4(8 - 9x)

To solve this expression, we need to substitute the value of x given as x = 11.3:

-36(11.3) + 17 - 4(8 - 9(11.3))

First, simplify the expression inside the parentheses:

-36(11.3) + 17 - 4(8 - 101.7)

Next, simplify the multiplication:

-405.6 + 17 - 4(8 - 101.7)

Now, simplify the subtraction inside the parentheses:

-405.6 + 17 - 4(-93.7)

Multiply -4 by both terms inside the parentheses:

-405.6 + 17 + 374.8

Combine like terms:

-411.6 + 374.8

Finally, perform the addition:

-36.8

Therefore, when x = 11.3, the expression evaluates to -36.8.