Question

3х+2=8 3х+2=3,5 5х-4=1/2 -0,2у-3,1=0,7

Answer 1

Відповідь:

Покрокове пояснення:

Answer 2

Let's solve the given equations one by one:

1. 3x + 2 = 8

To solve for x, we'll isolate x on one side of the equation by subtracting 2 from both sides:

3x + 2 - 2 = 8 - 2 3x = 6

Then, divide both sides of the equation by 3 to solve for x:

3x/3 = 6/3 x = 2

So the solution to the equation is x = 2.

2. 3x + 2 = 3.5

Similarly, we'll isolate x by subtracting 2 from both sides:

3x + 2 - 2 = 3.5 - 2 3x = 1.5

Divide both sides of the equation by 3:

3x/3 = 1.5/3 x = 0.5

Therefore, the solution to this equation is x = 0.5.

3. 5x - 4 = 1/2

To eliminate the fraction, we'll multiply both sides of the equation by 2:

2 * (5x - 4) = 2 * (1/2) 10x - 8 = 1

Now, add 8 to both sides to isolate x:

10x - 8 + 8 = 1 + 8 10x = 9

Divide both sides by 10:

10x/10 = 9/10 x = 0.9

Thus, the solution to the equation is x = 0.9.

4. -0.2y - 3.1 = 0.7

To solve for y, we'll first add 3.1 to both sides:

-0.2y - 3.1 + 3.1 = 0.7 + 3.1 -0.2y = 3.8

Divide both sides by -0.2:

(-0.2y)/(-0.2) = 3.8/(-0.2) y = -19

The solution to the equation is y = -19.

So the solutions to the given equations are:

1. x = 2
2. x = 0.5
3. x = 0.9
4. y = -19