Question

1) 3x+2/3их x +7=1 1/3я-1/3я x 2) x+ 2/5тых x-2=1 1/5ая x-1 3) 0,2x+3,1-2,2x=-3x+2,5-0,2x

Answer 1

1) 3x+2/3+x+7=11/3-1/3*x
9x+2x+21=11-x
11x+21=11-x
11x+11=11-21
12x=-10
x=-5/6 или x≈-0.83
2)x+2/5x-2=11/5x-1
5x+2x-10=11x-5
7x-10=11x-5
7x-11x=-5+10
-4x=5
x=-5/4
x=-1 1/4 или x=-1.25
3)0,2x+3.1-2.2x=-3x+2.5-0.2x
-2x+3.1=-3x+2.3
-2x+3x=2.3-3.1
x=-0.8 или x=-5/4

Answer 2

It seems like you've provided three equations that involve variable "x." To solve these equations, we need to simplify them and find the value of "x" that satisfies the equations. Let's solve them one by one:

1. $3x+\frac{2}{3}ix + 7 = \frac{4}{3} - \frac{1}{3}x$

This equation seems to have a complex number with the imaginary unit "i." However, it is not possible to solve an equation with both real and complex variables unless you provide more information or clarify the equation's context.

2. $x + \frac{2}{5}x - 2 = \frac{6}{5}x - 1$

Let's simplify this equation:

$x + \frac{2}{5}x - 2 = \frac{6}{5}x - 1$

Combine the "x" terms on the left side:

$\frac{7}{5}x - 2 = \frac{6}{5}x - 1$

Now, let's isolate the "x" term on one side:

$\frac{7}{5}x - \frac{6}{5}x = 2 - 1$

$\frac{1}{5}x = 1$

Finally, solve for "x":

$x = 1 \times 5$

$x = 5$

So, the solution for this equation is $x = 5$.

3. $0.2x + 3.1 - 2.2x = -3x + 2.5 - 0.2x$

Let's simplify this equation:

$0.2x + 3.1 - 2.2x = -3x + 2.5 - 0.2x$

Combine the "x" terms on the left side:

$0.2x - 2.2x = -3x - 0.2x + 2.5 - 3.1$

$-2x = -3.2x - 0.6$

Now, isolate the "x" term on one side:

$-2x + 3.2x = -0.6$

$1.2x = -0.6$

Finally, solve for "x":

$x = \frac{-0.6}{1.2}$

$x = -0.5$

So, the solution for this equation is $x = -0.5$.

Please note that if you intended to use the comma (,) as a decimal separator, you should replace the commas with periods (.) before solving the equations. For example, in equation 3, you should have $0.2x + 3.1 - 2.2x = -3x + 2.5 - 0.2x$ instead of $0,2x+3,1-2,2x=-3x+2,5-0,2x$.