Question

2) 8 – 0,2a = -0,4a + 4;

Answer 1

Ответ:

а = -20

Пошаговое объяснение:

-0.2a + 0,4а = 4 - 8

0,2а = -4

а = -4 : 0,2

а = -20

проверка

8 - 0,2 * (-20) = -0,4 * (-20) + 4

8 + 4 = 8 + 4

12 = 12

Answer 2

To solve the equation 8 - 0.2a = -0.4a + 4, we can start by simplifying the equation:

8 - 0.2a = -0.4a + 4

Let's eliminate the decimal coefficients by multiplying the entire equation by 10:

10(8) - 10(0.2a) = 10(-0.4a) + 10(4)

80 - 2a = -4a + 40

Next, we can gather the terms with 'a' on one side of the equation by adding 4a to both sides:

80 - 2a + 4a = -4a + 4a + 40

80 + 2a = 40

Now, subtract 80 from both sides of the equation:

80 + 2a - 80 = 40 - 80

2a = -40

Finally, divide both sides of the equation by 2 to isolate 'a':

(2a)/2 = -40/2

a = -20

Therefore, the solution to the equation 8 - 0.2a = -0.4a + 4 is a = -20.