Question

Реши уравнения 1)2x-5=9 2)0.6+x=7 3)0,4x-1=2,2 4)0,5x+3=5 5)2,5x-3=7 6)0,2x+7=8 срочняк ребят !!

Answer 1

2х-5=9
2х=9+5
2х=14
х=14:2
х=7
0.6+х=7
х=7-0.6
х=6.4

0.4х-1=2.2
0.4х=2.2+1
0.4х=3.2
х=3.2:0.4
х=8

Answer 2

Уравнения:

1) 2x-5=9

To solve the equation 2x-5=9, we can add 5 to both sides of the equation to isolate the variable x. Then, we divide both sides by 2 to solve for x.

Adding 5 to both sides: 2x = 9 + 5 2x = 14

Dividing both sides by 2: x = 14 / 2 x = 7

So, the solution to the equation 2x-5=9 is x = 7.

2) 0.6+x=7

To solve the equation 0.6+x=7, we can subtract 0.6 from both sides of the equation to isolate the variable x.

Subtracting 0.6 from both sides: x = 7 - 0.6 x = 6.4

So, the solution to the equation 0.6+x=7 is x = 6.4.

3) 0,4x-1=2,2

To solve the equation 0,4x-1=2,2, we can add 1 to both sides of the equation to isolate the variable x. Then, we divide both sides by 0.4 to solve for x.

Adding 1 to both sides: 0.4x = 2.2 + 1 0.4x = 3.2

Dividing both sides by 0.4: x = 3.2 / 0.4 x = 8

So, the solution to the equation 0,4x-1=2,2 is x = 8.

4) 0,5x+3=5

To solve the equation 0,5x+3=5, we can subtract 3 from both sides of the equation to isolate the variable x.

Subtracting 3 from both sides: 0.5x = 5 - 3 0.5x = 2

Dividing both sides by 0.5: x = 2 / 0.5 x = 4

So, the solution to the equation 0,5x+3=5 is x = 4.

5) 2,5x-3=7

To solve the equation 2,5x-3=7, we can add 3 to both sides of the equation to isolate the variable x. Then, we divide both sides by 2.5 to solve for x.

Adding 3 to both sides: 2.5x = 7 + 3 2.5x = 10

Dividing both sides by 2.5: x = 10 / 2.5 x = 4

So, the solution to the equation 2,5x-3=7 is x = 4.

6) 0,2x+7=8

To solve the equation 0,2x+7=8, we can subtract 7 from both sides of the equation to isolate the variable x.

Subtracting 7 from both sides: 0.2x = 8 - 7 0.2x = 1

Dividing both sides by 0.2: x = 1 / 0.2 x = 5

So, the solution to the equation 0,2x+7=8 is x = 5