Question

4 1/2 (2х-4) -8,1(2/9+1 1/9х)=-19,8

Answer 1

Ответ:

Пошаговое объяснение:

4 1/2 (2х - 4) - 8,1(2/9 + 1 1/9х) = -19,8

9/2*(2х - 4) - 81/10*(2/9 + 10/9х) = -19,8

9х - 18 - 9/5 - 9х = -19,8

-18 - 1,8 = -19,8

- 19,8 = -19,8

Answer 2

To solve the equation 4 1/2(2x-4) - 8.1(2/9 + 1 1/9x) = -19.8, we can follow these steps:

First, let's simplify the equation using the distributive property and perform any necessary operations on the fractions.

4 1/2(2x-4) = 4.5(2x-4) = 9x - 18 (multiplying the whole number by the expression inside the parentheses)

8.1(2/9 + 1 1/9x) = 8.1(2/9 + 10/9x) = 8.1(2/9) + 8.1(10/9x) = 1.8 + 8/9x = 1.8 + (8/9)x (using the distributive property)

Substituting the simplified expressions back into the equation:

9x - 18 - (1.8 + (8/9)x) = -19.8

Next, let's simplify and combine like terms:

9x - 18 - 1.8 - (8/9)x = -19.8 9x - (8/9)x - 18 - 1.8 = -19.8 (81/9)x - (8/9)x - 19.8 = -19.8 (73/9)x - 19.8 = -19.8

Now, we can isolate the variable x by adding 19.8 to both sides:

(73/9)x - 19.8 + 19.8 = -19.8 + 19.8 (73/9)x = 0

Finally, to solve for x, we multiply both sides by the reciprocal of (73/9):

x = 0 * (9/73) x = 0

Therefore, the solution to the equation is x = 0.