Question

0.9(х-0,9)-(0,7х+0,19)=20

Answer 1

Ответ:

х=105

Пошаговое объяснение:

0.9(х-0,9)-(0,7х+0,19)=20

0,9х-0,81-0,7х-0,19=20

0,2х-1=20

0,2х=20+1

0,2х=21

х=21:0,2

х=105

Answer 2

To solve the equation 0.9(x - 0.9) - (0.7x + 0.19) = 20, we'll follow these steps:

1. Distribute the constants and coefficients to simplify the equation.
2. Combine like terms.
3. Solve for x.

Let's go through each step:

1. Distribute the constants and coefficients: 0.9x - 0.9 * 0.9 - 0.7x - 0.19 = 20

2. Combine like terms: (0.9x - 0.7x) - (0.9 * 0.9 + 0.19) = 20 0.2x - (0.81 + 0.19) = 20 0.2x - 1 = 20

3. Solve for x: 0.2x = 20 + 1 0.2x = 21 x = 21 / 0.2 x = 105

So, the solution to the equation is x = 105.