Question

X-3(x-2)=18+2(5x-0,4)-4,2x

Answer 1

Х-3х+6=18+10х-0,8-4,2х
-2х+6=17,2+5,8х
-7,8х=11,2
х=11,2:(-7,8)
х= -1  $\frac{34}{78}$

Answer 2

Х-3х+6=18+10х-0,8-4,2х
х-3х+6-18-10х+0,8+4,2х
-7,8х-11,2
-7,8х=11,2
х= - 56/39

Answer 3

Let's solve the equation step by step:

1. Distribute the terms on the left side and right side: X - 3(x - 2) = 18 + 2(5x - 0.4) - 4.2x

   Expand: X - 3x + 6 = 18 + 10x - 0.8 - 4.2x

2. Combine like terms on each side: X - 3x + 6 = 10x + (18 - 0.8) - 4.2x

   X - 3x + 6 = 10x + 17.2 - 4.2x

3. Move all the terms with 'x' to one side and the constant terms to the other side: X - 10x + 4.2x = 17.2 - 6

   -3x + 4.2x = 11.2

4. Combine the 'x' terms: 1.2x = 11.2

5. Finally, solve for 'x': x = 11.2 / 1.2 x = 9.33 (rounded to two decimal places)

So, the solution to the equation is x = 9.33.