Question

2-(0,9х-1,3)=1,3х ВПР

Answer 1

2-(0,9x-1,3)=1,3х (раскрываем скобки с обратным знаком, так как знак "минус")
2-0,9х+1,3=1,3х (переносим неизвестные влево, известные - вправо; не забудьте изменить знак при переносе)
-0,9х-1,3х=-2-1,3 (приводим подобные)
-2,2х=-3,3 (делим на коэффициент перед переменной, т.е. -2,2)
х=1,5 

Ответ: х=1,5

Answer 2

0,9х-1,3=2-1,3
0,9х-1,3=0,7
0,9х=1,3+0,7
0,9х=3
х=3:9*10
х=1,6

Answer 3

To solve the equation, follow these steps:

Step 1: Distribute the number outside the parentheses to the terms inside. Step 2: Simplify the expression on the left side of the equation. Step 3: Isolate the variable (x) on one side of the equation.

Let's go through the steps one by one:

Step 1: Distribute the number outside the parentheses to the terms inside. 2 - (0.9x - 1.3) = 1.3x

Distribute the negative sign to both terms inside the parentheses: 2 - 0.9x + 1.3 = 1.3x

Step 2: Simplify the expression on the left side of the equation. Combine the constants (2 + 1.3 = 3.3): 3.3 - 0.9x = 1.3x

Step 3: Isolate the variable (x) on one side of the equation. To isolate the x variable, we need to get all the x terms on one side of the equation and the constant terms on the other side. Let's move the 1.3x to the left side by subtracting 1.3x from both sides:

3.3 - 0.9x - 1.3x = 1.3x - 1.3x

Simplify the left side: 3.3 - 2.2x = 0

Now, we need to get rid of the constant term on the left side, which is 3.3. We can do this by subtracting 3.3 from both sides:

3.3 - 2.2x - 3.3 = 0 - 3.3

Simplify the left side: -2.2x = -3.3

Finally, to find the value of x, divide both sides by -2.2:

x = -3.3 / -2.2

x = 1.5

So, the solution to the equation is x = 1.5.