Question

0,4 3x – 0,8 – 2(0,7 – 1,2x) = 1.

Answer 1

1,2х - 0,32 - 1,4 + 2,4х = 1
3,6х + 1,72 = 1
3,6х = 1 - 1,72
3,6х = -0,72
х = -0,72 : 3.6
х = 0,2

Answer 2

To solve the given equation, let's simplify and solve step by step.

0.4 + 3x - 0.8 - 2(0.7 - 1.2x) = 1

First, let's distribute the -2 to the terms inside the parentheses:

0.4 + 3x - 0.8 - 2 * 0.7 + 2 * 1.2x = 1

Next, simplify the terms inside the parentheses:

0.4 + 3x - 0.8 - 1.4 + 2.4x = 1

Combine like terms:

(3x + 2.4x) + (0.4 - 0.8 - 1.4) = 1

5.4x - 1.8 = 1

Now, let's isolate the variable x. Move the constant term (-1.8) to the right side by adding 1.8 to both sides:

5.4x = 1 + 1.8

5.4x = 2.8

Finally, divide both sides by 5.4 to solve for x:

x = 2.8 / 5.4

Simplifying the division:

x ≈ 0.519