Question

1) 3х-18=4х-10 2)1,2х+5,5=0,1х 3)?(3х-1)=5(х-3)

Answer 1

Ответ:

1) 3х-18=4х-10

2х-18-4х+10=0

-2х-8=0 (делим на - 1)

2х+8=0 (делим на 2)

х=-4

2) 1.2х+5.5=0.1х

1.2х+5.5-0.1х=0

1.1х+5.5=0 (делим на 1.1)

х=-5

3)(3х-1)=5(х-3)

3х-1-5х+15=0

-2х+14=0 (делим на - 2)

х=7

Answer 2

Let's solve each of these equations step by step:

1. 3x - 18 = 4x - 10

To solve for x, you want to isolate x on one side of the equation. Start by moving the variable terms to one side and the constant terms to the other side:

3x - 4x = -10 + 18

Now, combine like terms:

-x = 8

To solve for x, multiply both sides by -1:

x = -8

So, the solution is x = -8.

2. 1.2x + 5.5 = 0.1x

First, let's get rid of the decimal points by multiplying both sides by 10 to eliminate the decimals:

10(1.2x + 5.5) = 10(0.1x)

Now, distribute the 10 on both sides:

12x + 55 = 1x

Next, move the term with x to one side and the constant term to the other side:

12x - 1x = -55

Combine like terms:

11x = -55

Now, to solve for x, divide both sides by 11:

x = -55 / 11 x = -5

So, the solution is x = -5.

3. ?(3x - 1) = 5(x - 3)

It seems like you're looking for a value that makes the equation true, but you didn't specify what you're solving for. If you want to solve for x, you can do that as well:

Distribute on both sides:

3x - 1 = 5x - 15

Now, move the variable terms to one side and the constant terms to the other side:

3x - 5x = -15 + 1

Combine like terms:

-2x = -14

To solve for x, divide both sides by -2:

x = (-14) / (-2) x = 7

So, the solution is x = 7.

If you have a specific question about equation 3, please provide more context, and I can help further.