Question

7,5x-0,8=29,2. 50-2,7x=39,5 с решением пожалуйста.

Answer 1

Ответ:

х=4 , х=3,9

Пошаговое объяснение:

7.5х-0,8=29,2

7,5х=29,2+0,8

7,5х=30

х=30/7,5

х=4

50-2,7х=39,5

2,7х=50-39,5

2,7х=10,5

х=10,5/2,7

х=3,9

Answer 2

Sure, let's solve the given equations step by step:

1. 7.5x - 0.8 = 29.2

To solve for x, we'll first isolate the variable on one side of the equation by performing the necessary operations:

Add 0.8 to both sides to get rid of the constant term on the left side:

7.5x - 0.8 + 0.8 = 29.2 + 0.8

Simplify:

7.5x = 30

Next, we need to isolate x, so we'll divide both sides by 7.5:

7.5x / 7.5 = 30 / 7.5

Simplify:

x = 4

So, the solution to the first equation is x = 4.

2. 50 - 2.7x = 39.5

To solve for x, we'll isolate the variable again:

Subtract 50 from both sides to move the constant term to the right side:

50 - 50 - 2.7x = 39.5 - 50

Simplify:

-2.7x = -10.5

Now, divide both sides by -2.7 to find the value of x:

(-2.7x) / (-2.7) = (-10.5) / (-2.7)

Simplify:

x = 3.88888888... (repeating decimal)

Rounded to two decimal places, x ≈ 3.89

So, the solution to the second equation is x ≈ 3.89.

To summarize:

1. x = 4
2. x ≈ 3.89