Question

Х-1,7=4х-13,4...4*(3,5-2х)=-18-3х...-5(0,4у-2,5)=-у+16,4

Answer 1

Решение смотрите на фото.

Answer 2

To solve the equations, let's start with each one:

1. Х - 1.7 = 4х - 13.4

To solve this equation, we need to combine like terms and isolate the variable x on one side.

Subtract 'x' from both sides:

Х - x - 1.7 = 4х - x - 13.4

Simplify:

-1.7 = 3х - 13.4

Next, add 13.4 to both sides:

-1.7 + 13.4 = 3х - 13.4 + 13.4

Simplify:

11.7 = 3х

Finally, divide both sides by 3 to solve for x:

x = 11.7 / 3 x = 3.9

So the solution for the first equation is x = 3.9.

2. 4*(3.5 - 2х) = -18 - 3х

Let's solve this equation:

Distribute the 4 on the left side:

4 * 3.5 - 4 * 2х = -18 - 3х

Simplify:

14 - 8х = -18 - 3х

Next, isolate 'x' on one side. Add 3x to both sides:

14 - 8х + 3х = -18 - 3х + 3x

Simplify:

14 - 5х = -18

Now, add 18 to both sides:

14 - 5х + 18 = -18 + 18

Simplify:

32 - 5х = 0

Now, subtract 32 from both sides:

32 - 5х - 32 = 0 - 32

Simplify:

-5х = -32

Finally, divide both sides by -5 to solve for x:

x = -32 / -5 x = 6.4

So the solution for the second equation is x = 6.4.

3. -5(0.4у - 2.5) = -у + 16.4

Let's solve this equation:

Distribute the -5 on the left side:

-5 * 0.4у - (-5) * 2.5 = -у + 16.4

Simplify:

-2у + 12.5 = -у + 16.4

Next, isolate 'у' on one side. Add 'у' to both sides:

-2у + у + 12.5 = -у + у + 16.4

Simplify:

-у + 12.5 = 16.4

Now, subtract 12.5 from both sides:

-у + 12.5 - 12.5 = 16.4 - 12.5

Simplify:

-у = 3.9

Finally, divide both sides by -1 to solve for у:

у = 3.9 / -1 у = -3.9

So the solution for the third equation is у = -3.9.

To recap the solutions:

1. x = 3.9
2. x = 6.4
3. у = -3.9