Question

1)12х-5х=3,192; 2) 0,72 :(0,8-х)=1,5.

Answer 1

1) 12x-5x=3,192

7x=3,192 | :7

x=0,456

Ответ: 0,456

2)0,72:(0,8-x)=1,5 | *(0,8-x)

0,72=1,5(0,8-x)

0,72=1,2-1,5x

1,5x=1,2-0,72

1,5x=0,48 | :1,5

x=0,32

Ответ: 0,32

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Answer 2

Пошаговое объяснение:

12х-5х=3,192

7х=3,192

хх=3,192:7

хх=0,456

2)0.72:(0.8-х)=1,5

0,8-х=0,72:1,5

0,8-х=0,48

хх=0,8-0,48

Х=0,32

Answer 3

Let's solve each equation step by step:

1. 12x - 5x = 3,192

Combining like terms on the left side of the equation, we have:

7x = 3,192

Now, we can isolate x by dividing both sides of the equation by 7:

x = 3,192 / 7

Calculating the division, we get:

x ≈ 0.456 (rounded to three decimal places)

Therefore, the solution to the first equation is x ≈ 0.456.

2. 0.72 / (0.8 - x) = 1.5

To simplify the equation, we can start by isolating the denominator on one side:

0.8 - x = 0.72 / 1.5

Dividing 0.72 by 1.5, we get:

0.8 - x = 0.48

Next, let's isolate x by subtracting 0.8 from both sides:

-x = 0.48 - 0.8

Simplifying further, we have:

-x = -0.32

To solve for x, we multiply both sides of the equation by -1:

x = 0.32

Therefore, the solution to the second equation is x = 0.32.

In summary:

1. x ≈ 0.456
2. x = 0.32