Question

Розв'язати рівняння1 ) (3,9-х):4=0,72) 6*(х+1,5)=25,23 ) 26,2-5х=17,4​​

Answer 1

1)(3.9 - x) / 4 = 0.7
3.9 / 4 - x / 4 = 0.7
-x / 4 = 0.7 - 3.9 / 4
-x / 4 = 0.175
x = -0.7

2)6 * (x + 1.5) = 25.2
6x + 9 = 25.2
6x = 16.2
x = 2.7

3)26.2 - 5x = 17.4
-5x = -8.8
x = 1.76

Answer 2

1. (3.9 - x) / 4 = 0.7

To solve this equation, we can start by multiplying both sides of the equation by 4 to eliminate the denominator:

4 * [(3.9 - x) / 4] = 4 * 0.7

This simplifies to:

3.9 - x = 2.8

Next, let's isolate x by subtracting 3.9 from both sides:

3.9 - x - 3.9 = 2.8 - 3.9

This simplifies to:

-x = -1.1

Finally, we can solve for x by multiplying both sides by -1:

-x * (-1) = -1.1 * (-1)

This gives us:

x = 1.1

Therefore, the solution to the equation is x = 1.1.

2. 6 * (x + 1.5) = 25.2

To solve this equation, we'll begin by distributing the 6 to the terms inside the parentheses:

6x + 6 * 1.5 = 25.2

Simplifying further:

6x + 9 = 25.2

Next, we can isolate the variable term by subtracting 9 from both sides:

6x + 9 - 9 = 25.2 - 9

Simplifying gives us:

6x = 16.2

Finally, we can solve for x by dividing both sides by 6:

6x / 6 = 16.2 / 6

This yields:

x = 2.7

Therefore, the solution to the equation is x = 2.7.

3. 26.2 - 5x = 17.4

To solve this equation, we'll begin by isolating the variable term by subtracting 26.2 from both sides:

26.2 - 5x - 26.2 = 17.4 - 26.2

Simplifying gives us:

-5x = -8.8

Next, we can solve for x by dividing both sides by -5:

-5x / -5 = -8.8 / -5

This yields:

x = 1.76

Therefore, the solution to the equation is x = 1.76.